Phát biểu nào diễn tả đúng tính chất của các chất tham gia phản ứng trong phường trình hóa học sau:
5H2S + 2KMnO4 + 3H2SO4  2MnSO4 + K2SO4 + 5S + 8H2O.
A. H2S là chất khử, H2SO4 là chất oxi hóa.
B. H2S là chất khử, KMnO4 là chất oxi hóa.
C. H2S là chất oxi hóa, KMnO4 là chất khử.
D. H2SO4 là chất oxi hóa, KMnO4 là chất khử.

Choose the correct sentence which is built from the words and phrases given:
He/ promise/ send/ me/ postcard/ as soon as/ arrive/ Madrid.
A. He promised send me a postcard as soon as he arrived in Madrid.
B. He promised to send me a postcard as soon as he arrived at Madrid.
C. He promised to send me a postcard as soon as he arrived in Madrid.
D. He promised to sending me a postcard as soon as he arrived in Madrid.

Choose the correct sentence which is built from the words and phrases given:
I / grateful/ kindness/ visit/ your factory/ last month.
A. I’m grateful for your kindness when I visited your factory last month.
B.  I’m grateful with your kindness to me when I visited your factory last month.
C. I’m grateful of your kindness to me when I visited your factory last month.
D. I’m grateful at your kindness to me when I visited your factory last month.

Choose the correct sentence which is built from the words and phrases given:
We/ invite/ party/ occasion/ her birthday.
A. We were invited to the party with the occasion of her birthday .
B. We were invited to the party for the occasion of her birthday.
C. We were invited to the party at the occasion of her birthday.
D. We were invited to the party on the occasion of her birthday.

Choose the correct sentence which is built from the words and phrases given:
Type/ raw materials/ use/ make/ paper/ process/ essential/ same. 
A. However type of raw materials are used in making paper, the process is essentially the same.
B. Whatever type of raw materials are used in making paper, the process is essentially the same.
C. Wherever type of raw materials are used in making paper, the process is essentially the same.
D. Whereas type of raw materials are used in making paper, the process is essentially the same.

Choose the correct sentence which is built from the words and phrases given:
This computer/ run/ ten times/ fast/ old one.
A. This computer runs fast ten times than the old one.
B. This computer runs ten times faster than the old one.
C. This ten times computer runs faster than the old one.
D. This computer runs faster ten times than the old one.

Choose the correct sentence which is built from the words and phrases given:
You/ feel/ like/ go out/ this evening?
A. Are you feel like going out this evening?
B. Do you feel to like going out this evening?
C. Do you feel like go out this evening?
D. Do you feel like going out this evening?

Choose the correct sentence which is built from the words and phrases given:
Opinion/ violent films/ not show/ television.
A. With my opinion, violent films should not be shown on television.
B. For my opinion, violent films should not be shown on television.
C. In my opinion, violent films should not be shown on television.
D.  To my opinion, violent films should not be shown on television.

Choose the correct sentence which is built from the words and phrases given:
sum of money / we / build / ten more rooms / buy / some new furniture
 
 
A. For the sum of money we will built ten more rooms and buy some new furniture. 
B. Despite that sum of money we build ten more rooms and bought some new furniture. 
C. Thanks to the sum of money which we have built ten more rooms and bought some new furniture. 
D. With that sum of money we have built ten more rooms and bought some new furniture.

Choose the correct sentence which is built from the words and phrases given:
Joe / not / good / swimmer / however / jump / river / rescue / little / girl / who / drown.
A. Joe wasn’t a good swimmer however jumping in the river rescuing a little girl who was drowning.
B. Joe wasn’t the good swimmer, however he jumped in the river to rescue a little girl who drowned.
C. Joe wasn’t a good swimmer. However, he jumped into the river to rescue the little girl who was drowning.
D. Joe wasn’t the good swimmer; however, he jumped into the river rescuing the little girl who drowned.