题目内容

Water pipes ______ rusty after a period of use.

A. become
B. is becoming
C. are become
D. were become

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This foreign scientist ______ in our college for fifteen years and does not want to leave.

A. worked
B. is working
C. works
D. has been working

______ to have dinner with us tonight?

A. Will you like
B. Do you like
C. Wouldn’t you like
D. Won’t you like

What I was uncertain about ______ whether they could overcome the difficulties.

A. is
B. will be
C. had been
D. was

“Certainly,______ him about something else in any case, so it won’t be any bother.”

A. I’ll see
B. I see
C. I can see
D. I’ll be seeing