The man was seen        the park. But now we couldn't find him there.
#49524
A
enter
B
to enter
C
going
D
went into
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In our school, everyone needs        English    . 
#50750
A
speaking ;good
B
speak ;well
C
speaking ;well
D
to speak; well
Thank you for _________ me presents.
#49033
A
send
B
sending
C
give
D
gives
We should wear special boots __________ us floating away into the space .
#48510
A
to prevent
B
preventing
C
prevent
D
prevented