单项选择题


A．an inventor
B．inventer
C．inventor
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单项选择题
I don't know if he ______ tomorrow. If he ______ tomorrow, please let me know.
A．will come... will come
B．comes... comes
C．will come... comes
单项选择题
Look! The children ______ on the ground happily. Let's join them.
A．play
B．have played
C．are playing
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