题目内容

23. If either Tom or Betty _____ ,he or she will help me with my questions on English.

A. come
B.came
C. comes
D. has come

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24. Our teacher recommends that we _____ as attentive as possible when we visit the museum.

A. are
B. shall be
C. were
D. be

25. Only when you have acquired a good knowledge of the field, _____.

A. you can pass the exam
B. you passed the exam
C. can you pass the exam
D. you will pass the exam

26. The student's _____ French well helped him a lot in learning English.

A. know
B. to know
C. knew
D. knowing

27. There are many children and adolescents ______ behavior is generally unacceptable.

A. who
B. whom
C. whose
D. that