–A boy was killed by the tiger in the zoo. –He was believed ______ into the cage while feeding the tiger without permission.
#94287
A
to fall
B
to be falling
C
to have fallen
D
having fallen
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________ to our study is the best way ________ high grades.
#90501
A
Devote ourselves; to achieve
B
Devoting us; of achieving
C
Devoting ourselves; to achieve
D
Devoted ourselves; of achieving
He seems to         Jane. He knows her well.
#93823
A
introduce to
B
be introducing to
C
be introduced to
D
have been introduced to
___ time, he’ll make a first-class tennis player.  
#92431
A
Having given
B
To give
C
Giving
D
Given