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linhtm2911
2 năm trước
tính số mol và số gam KMnO 4 (KClO 3 ) cần thiết để điều chế được: 9,6 g khí oxi. 26,88 lít khí oxi ở đktc.
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1-10. Fill in the blanks with the correct forms of the verbs in brackets. Use the present simple, present continuous or present perfect. Mai: (you/ hear) (1) ______ of Nam taking part in the school singing contest? Quang: Really? When is the contest? Mai: It (take place) (2) _______ on this Sunday, May 21st. Quang: What time (it/ start) (3) ______ ? Mai: It (start) (4) _______ at 2 p.m in the main hall of our school. Quang: Wonderful. I (never/ listen) (5) _______ to Nam singing. (you/ go) (6) _______ to see the contest? Mai: Of course. He (be) (7) _______ the only person in our class to participate in the contest. Let’s come to cheer for him. Quang: That (sound) (8) ______ great! Mai: By the way, (you/ do) (9) _______ anything this Sunday morning? We could buy some flowers to give Nam after the contest. Quang: Good idea. We can get the bus to Flower World. It (leave) (10) _______ at 9:30 a.m. Mai: All right. See you at the bus stop. Bye. Quang: Bye bye.

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