未指定存储类别的变量,其隐含的存储类别为____。 A)auto B)static C)extern D)register
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— What are you doing?— I ___ some clothes.
A. wash
B. am washing
C. washed
What about ___ to the cinema(电影院) on Sunday?
A. go
B. going
C. to go
Look at the boy. He ___ on the desk.
A. stand
B.is standing
C. stands
Look! Jimmy with her mother ___ over the bridge.
A. is walking
B. are walking
C. walk