—I’m terribly sorry to have given you so much trouble.
— ______
A.Don’t mention it! | B.How come? |
C.That’s all right. | D.So what? |
I'll come to see you if _____.
A.you're convenient | B.it is convenient for you |
C.you feel convenient | D.it is convenient with you |
—Must I turn off the gas after cooking ?
—Of course . You can never be _______ careful with
that.
A.enough | B.too | C.so | D.very |
_____ is known to everybody, the moon travels round the earth once every month.
A.It | B.As | C.That | D.What |
It is so difficult a problem that _____ student in this class _____ work it out.
A.any, can't | B.no, can | C.every, can | D.no, can't |
Shirley _____ a book about China last year, but I don't know whether she has finished it.
A.has written | B.wrote | C.had written | D.was writing |