问题
选择题
The thief was noticed ______ the office building by the back door on the screen. [ ]
A. enter
B. enter into
C. to enter
D. to enter into
答案
答案：C
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The thief was noticed ______ the office building by the back door on the screen. [ ]
A. enter
B. enter into
C. to enter
D. to enter into
答案：C