单项选择题

Parents and teachers should work together to () students’ lives.

A.effect
B.make
C.influence
D.shape

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所谓自下而上分析法就是从输入串开始，逐步进行“归约”，直至归约到文法的()。

A.开始符号
B.终结符
C.非终结符
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______ he use your bike? Certainly. Here is the key.

A.Will
B.Shall
C.Must
D.Does