摘要：is playing 表达动作正在发生.要用现在进行时.主语是Tom,所以要用单数.
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The little boy is dirty from head to foot because he ________ in the mud all morning.
A. has played B. is playing
C. has been playing D. was playing
查看习题详情和答案>>The little boy is dirty from head to foot because he ______ in the mud all morning.
|
A．has played |
B．has been playing |
|
C．is playing |
D．was playing |
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E－mail,as well as telephones, an important part in daily communication.
A.is playing B.have played
C.are playing D.play
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