I’m sorry I didn’t hear what you said. I ________ the picture.
#101504
A
am looking at
B
looked at
C
has looked at
D
was looking at
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I didn’t hear you because I __________ the news on the radio.
#100146
A
listen to
B
am listening to
C
listened to
D
was listening to
After school we went to the reading-room to do some reading ,only to be told that it _______.
#99938
A
was decorated
B
had decorated
C
had been decorating
D
was being decorated
During the past 120 years, the world three waves of global economic integration（联合）.
#100672
A
witnessed
B
witnesses
C
has witnessed
D
will witness
Social attention should be paid our earth from .
#102039
A
to prevent; being polluted
B
to preventing; polluted
C
to prevent; polluting
D
to preventing; being polluted
Nothing that he suggested _____ to be of any use.
#100775
A
prove
B
proved
C
proving
D
has been proved