题目内容

Jack ______from home for two days now , and I am beginning to worry abouthis safety.

A. has been missing
B. had been missing
C. was missed

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For some time now , world leaders ______out the necessity for agreement onarms reduction.

A. has been pointing
B. have been pointing
C. were pointing
D. pointed

Susan _______ the magazine the whole morning, yet she hasn't fmished it.

A. has read
B. is reading
C. reads
D. has been reading

They so tired if they for a whole day.

A. wouldn't be feeling; weren't walking
B. wouldn't be feeling; hadn't been walking

________ terms, we would go bankrupt.

A. If we accept
B. If we should accept
C. If we had accepted
D. If we are to accept