They ________ carefully, but they didn’t ________ anything. 
#43281
A
listened; listen
B
listened; hear
C
heard; listen
D
heard; hear
推荐题目
—Does Mary only have an apple for breakfast?—Yes. She eats like a bird ______.
#35823
A
to wake up
B
to be strong
C
to lose weight
D
to fall asleep