ánh viên là một động viên bơi lội. để chuẩn bị cho kỳ seagame tới. trong đợt tập huấn ban huấn luyện viên ghi lại thành tích của Ánh Viên trong 4 lần bơi thì thời gian trung bình đạt 10 giây trong lần bơi tiếp theo thì vận động viên Ánh Viên phải đạt thành tích bao nhiêu giây để được thời gian trung bình 9,8 giây

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1.We need to fix the roof ________ there might be strong wind blowing. A. if B. however C. although D. because 2. Is it _____ they will come for a short stay at Christmas? A. right for B. true that C. afraid so D. hopeful there 3. “__________” “I think so, too” A. We have no canned food B. How come you didn’t show up? C. Congratulations! D. We should check all the window and door latches. 4. “ Shall we go to the concert this evening?” - “_____________” A. Not a bad idea B. Not at all C. Why don’t you like it D. You’re welcome 5. -“__________” -“ That really makes sense” A. How do you do? B. How come you did it? C. How soon will it come? D. How about planting some flowers there? 6. “Would you like a glass of green tea?” -“______________________________” A. No, let’s not. B. No, I don’t C. No, thanks. D. No, I wouldn’t. 7. The final match _________ on June 30 th . A. will be occurred B. takes place C. happening D. is going 8. Don’t throw trash onto the water _______ you want to make the environment polluted. A. unless B. though C. because D. if 9. It is essential that teachers _______ friendly to students. A. should B. be C. ought to D. are 10. Many people were injured when the building _________ A. collapsed B. destroyed C. struck D. erupted 11. The number of people killed in the tsunami last year ________ more than 200.000 people. A. were B. was C. is D. are 12. It’s over six months since the tidal wave ________ Phuket , Thailand. A. destroyed B. was destroyed C. destroys D. has destroyed 13. HCM city, _________ I live, lies on the River SaiGon. A. which in B. which C. in where D. where 14. A funnel-shaped storms passing overland below a thunderstorm is called a ______ A. typhoons B. tsunami C. tornado D. hurricane 15. Do you have the book _________ the teacher? A. that is belong to B. to which belongs to C. to which belongs D. that belong to 16. These buckets must be filled _________ water for futre use. A. of B. into C. with D. on 17. If the weather were better today, we __________ on a picnic. A. will go B. would have gone C. would go D. are going 18. Don’t forget _________ as soon as you arrive at your destination. A. calling B. to call C. call D. to calling 19. In Australia, a tropical storm __________ as a cyclone. A. knows B. know C. be known D. is known 20. I like the rice sticky cakes which ________ by my grandmother. A. making B. are making C. made D. are made