III. Chọn một đáp án đúng trong số A, B, C hoặc D để hoàn thành mỗi câu sau.
16. He often goes to the cinema, ______ ?
A. does he B. doesn’t he C. is he D. isn’t he
17. If it ______ rain, we’ll have the party in the garden.
A. wouldn’t B. doesn’t C. didn’t D. won’t
18. I was tired, ______ I went to bed early last night.
A. because of B. although C. because D. so
19. My teacher speaks English very ______.
A. well B. good C. slow D. quick
20. We’d better ______ really early. It’s a very long journey.
A. set up B. set off C. set down D. set on
21: She spoke so quietly that I _____ hear her.
A. nearly B. hardly C. basically D. shortly
22. It is a serious operation for a woman as old as my grandmother. She’s very frail. I hope she
________ A. gets away B. comes around C. pulled through D.
stands up
23 . ______ with her boyfriend yesterday, she doesn't want to answer his phone call.
A. Having quarreled B. Because having quarreled
C. Because-of she quarreled D. Had quarreled
24: The price of fruit has increased recently, _______ the price of vegetables has gone down.
A. whereas B. otherwise C. whether D. when
25. It’s none of your business; please don’t ________ things that don’t concern you.
A. bump into B. meddle with C.tot up D. come across

II. Chọn một từ đúng trong ngoặc để hoàn thành mỗi sau.
11. He drives so ______that he has never had any accidents. (CARE))
12. He is probably the most ______ tennis player of all time. (SUCCEED)
13. The baby laughed _______ as she played with her toys. (HAPPY)
14. There are some ______ between British English and American English. (DIFFER)
15. We are worried that rivers and cannals are becoming more and more ______. (POLLUTE)

\(\left\{{}\begin{matrix}\frac{1}{x}+\frac{1}{y}+xy=\frac{7}{2}\\2\left(x+y\right)=3xy\end{matrix}\right.\)

Một công nhân dự định làm 150 sản phẩm trong một thời gian nhất định. Sau khi làm được 2 giờ với năng suất dự kiến, người đó đã cải tiến các thao tác nên đã tăng năng suất được 2 sản phẩm mỗi giờ và vì vậy hoàn thành được 150 sản phẩm lớn hơn dự kiến 30 phút.Hãy tính dự kiến ban đầu

\(\left\{{}\begin{matrix}x+2y=1\\x^2+2y^2-2x+7y=-1\end{matrix}\right.\)

\(\left\{{}\begin{matrix}x^2+y^2-x-y=102\\xy+x+y=69\end{matrix}\right.\)

\(\left\{{}\begin{matrix}x+3y=2\\\frac{1}{x-2}+\frac{1}{y}=1\end{matrix}\right.\)

\(\left\{{}\begin{matrix}x^2+y^2=13\\\frac{\left(x+y\right)^2}{xy}=\frac{25}{6}\end{matrix}\right.\)