-What is Steve doing? -He on the phone. [

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-What is Steve doing?
-He          on the phone.               [     ]
A. is talking
B. talks
C. talk
D. talking

答案

举一反三

Mary"s mother __________ Chinese now. [ ]
A. teach
B. teaches
C. teaching
D. is teaching

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Some people are _____ on the beach. They are really _____. [ ]
A. lie; relax
B. lying; relaxed
C. lieing ; relaxed
D. lying; relaxing

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It _____ and some children are making a snow-man. [ ]
A. is snowing
B. is snow
C. snow
D. is sunny

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It"s a very beautiful place. A man is _____ photos here. [ ]
A. take
B. taking
C. drawing
D. draw

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We _____ to Nanjing next month. [     ]
A. has to fly
B. not fly
C. are flying
D. flew

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