题目内容

John has never been on time, ( )?

A. as John
B. has not John
C. has he
D. has not he

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They had talked only for a few minutes ( ) they found they were of different Opinions.

A. unless
B. while
C. before
D. once

It is Important to provide an environment ( ) people are encouraged to make suggestions at all levels of the company.

A. from which
B. on which
C. in which
D. for which

Now I ( ) the life here.

A. used to
B. used
C. am used to
D. used to be

About seventy percent of the surface of our planet ( ) covered by water.

A. are
B. is
C. were
D. was

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