根据括号内的提示完成句子

1. 众所周知，知识是一座宝库，而实践是开启宝库的钥匙。

_________________  knowledge is a treasure house, but practice is the key to it.(It is-- that -)

16. —How do you find the film you saw last night?

―    .I can't think too highly of it.

A. It makes no sense   B.  It all depends

C. It's just so-so     D. It's really splendid

15. ―I heard that you lost your wallet and your iPhone.

—Oh,     ！

A. never mind      B. that's all right

C. just my luck    D. thank you

14. ―Sorry, it's already 6 o'clock. I have to be off for an appointment.

—OK.     . See you.

A.    It couldn't be better

B.    You've got me there

C.    Let's call it a day

D.    Take your time

13. —He is a very hard-working student.

-一   .As far as I know, he often burns the midnight oil.

A.    You can say that again

B.    Absolutely not

C.    Heaven knows

D.    No way

8. ____________ (关于)the plan, you'd better carry it out.

7.     Many people think the man dressed ___________ (衣衫，监褛)is a beggar. In fact, they are wrong.

6.  It is rude of you to ______________ (盯着看)the strangers in the street.

5.     We should help __________________________ (任何在困难中的人）.

4.  Every one of us thinks a teacher should_______________ (对.. 有耐心)the students who have difficulty learning English.