--David, are you 1istening to me?---Sorry, Dad. I _______ to make sense of what the reporter said. 
#100681
A
was trying
B
have tried
C
am trying
D
tried
推荐题目
 Everything he _____ to his country.
#103067
A
had was contributed
B
had been contributed
C
had to be contributed
D
had contributed
Great changes_____ in the small city in the last 20 years.
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A
have taken place
B
took place
C
had taken place
D
are happening
he young man ________ a suggestion at the meeting.
#99285
A
come about
B
come into
C
come up with
D
come out with