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The thief was noticed _____the office building by the back door on the screen.
#51161
A
enter
B
enter into
C
to enter
D
to enter into
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—Maria likes singing. Do you often hear her _______ after class?—Yes, I do.
#49776
A
sing
B
to sing
C
sings
D
sang
 If you work hard, it’s not difficult for you ______ English well.
#48812
A
learn
B
learns
C
to learn
D
learning
---I feel tired and sleepy.  ---Why not stop______?
#50040
A
resting
B
lying
C
to relax
D
to work
The best colour         my cousin is yellow, so she looks         .
#50253
A
represents ; energetic
B
to represent ; energetic
C
represents ; energy
D
to represent ; energy
Mr. Wu came into the  classroom ,         a book in his hand.
#49562
A
hold
B
holds
C
holding
D
held