I hear the birds _______.
#51349
A
sing
B
to sing
C
sings
D
singing
推荐题目
One way _____ this problem ______ search for some information on the Internet.
#49168
A
solve; is to
B
to solve; is to
C
to solve; is
D
solve; is
—Why is Maria so nervous?  Because she doesn't know ________at the big party.
#49540
A
to wear what
B
to wear how
C
what to wear
D
how to wear
The young man used to _______ to work,but he is used to _______to work now.
#50511
A
drive,walking.
B
drove,walked.
C
drive,walks.
D
driving,walk
Why not_____an English club to practice_____English? 
#51265
A
to join; to speak
B
join; speaking
C
join; to speak
D
to join; speaking