---Don't put the waste on the ground. ---Oh, I'm very sorry. I ________ the dustbin（垃圾箱） there.
#101450
A
don't see
B
isn't seeing
C
didn't see
D
haven't seen
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— This is Tom speaking.— Oh, it’s great. But I ______ your voice just now.
#101279
A
didn’t know
B
didn’t recognize
C
didn’t hear
D
don’t know
— Where is Mr. Wang?— He is not here. He must _______ the students’ papers in the office.
#101138
A
correct
B
have corrected
C
be correcting
D
corrects
35．—Sorry for having kept you waiting ．But for the traffic jam,I________20 minutes earlier．—Never mind．I haven’t been waiting that long．
#103888
A
arrived
B
would arrive
C
would have arrived
D
had arrived
—— We didn’t find Smith attending the lecture.—— No one ____ him about _____ a lecture the following day.
#102893
A
told ；there to be
B
had told ; there to be
C
told; there was
D
had told ; there being
I asked him to come at 8 o’clock, but he _________. It’s already 9 now.
#102520
A
didn’t show up
B
hasn’t shown
C
hadn’t shown
D
wasn’t showing up