The fact has worried many scientists ______the Earth is becoming warmer and warmer these years.

A. what    B. which

C. that    D. though

Can you give me an example ______this phrase can be used?

A. when    B. that

C. where    D. which

Little _____what you said. I wish you had repeated it.

A. did understand    B. I understood

C. I did understand    D. have I understood

Tom was so careless with his spelling that he often _______letters from words.

A. left out    B. left behind

C. left off    D. let alone

—What do you think of Tim?

—He appears a kind person. I don’t like him ________.

A. even so    B. even though

C. though    D. yet

Having retired from business, he now ________himself with the welfare of the disabled.

A. adapts    B. charges

C. associates    D. occupies

______, we should sleep at sleep at least 8 hours a day, but in practice we sleep less than that.

A. In fact    B. In theory

C. On average    D. In particular

----Who’s the man giving the speech?

---Well, if you ______know, his name is Lyric.

A. may    B. can

C. shall    D. must

Just think! This time next week we ________in the sun in the south of France.

A. are going to sit    B. will have sat

C. are sitting    D. will be sitting

—Is David a man with good _________?

—I don’t think so. As a matter of fact, he is anything but polite.

A. methods    B. ways

C. manners    D. approaches