They ________ carefully, but they didn’t ________ anything. 
#43281
A
listened; listen
B
listened; hear
C
heard; listen
D
heard; hear
推荐题目
We saw flowers and trees everywhere.       
#43734
A
over there
B
here and there
C
somewhere
D
anywhere
I can’t find    to sit on the crowded bus.
#43195
A
nowhere
B
somewhere
C
anywhere
D
everywhere
How beautifully she sings! I have never heard _______ voice. 
#39344
A
the best
B
a best
C
the better
D
a better