The girl wearing glasses was observed in class by her teacher. [ ]A. to talk B.
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![The girl wearing glasses was observed in class by her teacher. [ ]A. to talk B.](/pic/43_1429135.jpg)
The girl wearing glasses was observed _____ in class by her teacher.[ ]A. to talk
B. to be talking
C. talking
D. to have talked
试题答案
C