I was deep in thought, so I didn't notice _____.
#98297
A
him to come in
B
him come in
C
he come in
D
him coming in
推荐题目
_______ 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