Choose one sentence that has the same meaning as the root one:
You will have to pay at least 100 pounds to get this camera.
A. You’ll be impossible to get this camera for less than 100 pounds.
B. You’ll find it impossible to get this camera for less than 100 pounds.
C. You’ll be impossible to get this camera less than 100 pounds.
D.  You’ll have to be paid at least 100 pounds to get this camera.

Choose one sentence that has the same meaning as the root one:
Your refusal to attend the party made everyone sad.
A. Everyone felt sad attending the party.
B. Everyone felt sad when you refused to attend the party.
C. Your attendance at the party made everyone feel sad.
D. You made everyone sad about your refusal to throw the party.

Choose one sentence that has the same meaning to the root one:
I haven’t read books since last week.
A. I last read books since last week
B. I last read books last week
C. I read books last week.
D. I didn’t read books a week ago.

Choose one sentence that has the same meaning as the root one:
It’s a pity that you didn’t tell us about this.
A. I wish you told us about this.
B. I wish you would tell us about this. 
C. I wish you had told us about this. 
D. I wish you have told us about this.

Choose one sentence that has the same meaning as the root one:
I should have studied last night, but I was too tired.
A. I couldn’t study last night because I was very tired.
B. I studied last night because I was bored.
C. I studied last night because I had to.
D. I tried to study last night, but the homework was too hard.

Choose one sentence that has the same meaning as the root one:
He last had his eyes tested ten months ago.
A. He has not had his eyes tested for ten months.
B. He had tested his eyes ten months before.
C. He had not tested his eyes for ten months then.
D.  He didn’t have any tests on his eyes in ten months.

Cho tứ diện $ABCD$ có$AC=AD$ và$BC=BD$. Gọi$I$ là trung điểm của$CD$. Khẳng định nào sau đây sai?
A. Góc giữa hai mặt phẳng $\left( ABC \right)$ và$\left( ABD \right)$ là$\widehat{CBD}$.
B. Góc giữa hai mặt phẳng $\left( ACD \right)$ và$\left( BCD \right)$ là$\widehat{AIB}$.
C. $\left( BCD \right)\bot \left( AIB \right)$.
D. $\left( ACD \right)\bot \left( AIB \right)$.

Choose one sentence that has the same meaning as the root one:
The film was so boring that I fell asleep.
A. The film was interesting enough, but I fell asleep.
B. I fell asleep because the film was boring.
C. I did not fall asleep even though the film was boring.
D. The film was too long for me to watch.

Choose one sentence that has the same meaning as the root one:
Linda seems to have very little record for other people's feelings.
A. Linda has very few feelings like other people’s.
B. Linda appears unconcerned about other people’s feelings.
C. Linda has difficulty expressing her feelings for other people.
D. Linda doesn’t respect people who feel sorry for themselves.

Cho hàm số y = xcosx - sinx, ta có đạo hàm là:
A. 2cosx - xsinx.
B. xsinx.
C. -xsinx.
D. Cả ba phương án đã cho đều sai.