根据句意、中文提示或英文释义,写出句中所缺单词，使句子通顺。

1. We should be brave enough to __________ (面对) all the difficulties.

2.When did Audrey __________ (come into) the film industry?

3.The students always ___________ (拒绝) to do so much homework every day.

4.The detective thought he had a criminal ___________.

5.Our earth is becoming more and more crowded and       (受污染的).

---May I go home right now?

---No, you____. You must finish your work first.

A. don’t             B. can’t

C. needn’t          D. mustn’t

It is very kind ____ you to help me with these maths problems because it is very difficult ____ me to work them out.

A. of; for              B. of; of

C. for; of              D. for; for

— Linda, could you tell me ______?

— He is an actor.

A. what he does                 B. what does he do

C. where he works              D. where does he work

______ he has make during the course!

A. What good progress           B. What a good progress

C. How good progress            D. How a good progress

---Who is ______ teacher in the white T-shirt?

---Oh, that is my English teacher, Peter.

A. /                 B. a

C. an                D. the

They were _________ busy _________ with each other _________ the time.

A. too; to talk; to forget

B. too; talking; to forget

C. so; talking; that they forgot

D. so; to talk; that they forgot

—What did you say just now?

—I asked __________.

A. that I could open the door        B. how I could open the door

C. how could I open the door         D. could I open to the door

—Whose book is this?

—It ________be Mary's. J. K. Rowling is her favorite writer.

—No, it ______ be hers . She never brings novels to school.

A. may, mustn't        B. can; can't

C. must; can't        D. must; mustn't

—I can't find any ______to show my thanks to you.

—You are welcome.

A. picture             B. energy

C. food                D. expressions