---How did the accident happen? ---You know, it ________difficult to see the road clearly because it_________. 
#38358
A
was; was raining
B
is; has rained
C
is; is raining
D
will be; will rain
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--Don’t smoke here. Look at the sign please. –Sorry, I _________it.
#37107
A
don’t notice
B
can’t notice
C
won’t noticing
D
didn’t notice
Mr. White           a lot of places of interest in China .
#39893
A
have gone to
B
has gone to
C
have been to
D
has been to