When he ran downstairs, he tried to avoid ____by the teacher.
#93197
A
being seen
B
seeing
C
to be seen
D
to see
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_______ the secret of nature, the young scientist has little time for entertainment.
#91721
A
Devoted to bring out
B
Devoted himself to bringing out
C
Devoted to bringing out
D
Devoting to bring out
 In the USA, he made a lot of friends ______ English well to make himself ______.
#97969
A
learn; understand  
B
to learn; understood
C
learning; understand
D
learned; understood