单项选择题

______，I will help you with your work．

A．If am possible
B．If it possible
C．If possible
D．Possible
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单项选择题
It is the protection for the trees ______ really matters，rather than how many trees are planted．
A．what
B．that
C．不填
D．which
单项选择题
______ was very ______ that little Jim wrote the letter.
A. It, careful
B. It, carefully
C. He, careful
D. He, carefully
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