I hear the birds _______.
#51349
A
sing
B
to sing
C
sings
D
singing
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Before I started high school, I used to spend a lot of time _____ games with my friends.
#50758
A
play
B
plays
C
playing
D
played
The couple ______at this time yesterday. Nobody knew when they stopped.
#50618
A
heard quarrelling
B
heard to quarrel
C
were heard quarrelling
D
was heard to quarrel
Lily thinks wearing earrings makes people look beautiful, so she wants to get her ears ___________．
#50523
A
pierce
B
pierced
C
to pierce
D
piercing