题目内容

Homework on time will lead to better grades.

A. done
B. be done
C. having done
D. to have done

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The students all tell their problems to one of the more ____________teachers.

A. sympathetic
B. real
C. typical
D. understanding

Materials have now become one of the most important factors ______ the advance of technology and industry depends.

A. on which
B. with which
C. of which
D. for which

Sailors like to go sight-seeing when they are ____________ in a foreign port.

A. off duty
B. in common
C. by chance
D. ahead of

He has finished Book Six, but we haven't taken the exam ____________.

A. yet
B. already
C. still
D. also

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