All the students stopped ____ when the severe professor walked into the classroom.
(A)to talk
(B)and talked
(C)to be talking
(D)talking

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統計: A(68), B(9), C(3), D(750), E(0) #325514

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#2733323
http://210.240.55.2/~t311/moe/engb4/b4grammar/b4remember.htm
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私人筆記#5909943
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STOP用法   stop Ving  ...
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