--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
My watch _____ at nine o’clock, but now it _____.
#101326
A
was going; stopped
B
went; is stopping
C
was going; has stopped
D
went; stopped
This is the best dinner that I________.
#99168
A
enjoyed
B
have enjoyed
C
had enjoyed
D
enjoy
We won’t go to the park if it ______ tomorrow.
#100149
A
is snowing
B
will snow
C
snows
D
snowed