單項(xiàng)選擇題

He wondered if he could slip out of the lecture hll withoutnyone _____.noticingB．noticedC．

to noHe wondered if he could slip out of the lecture hll withoutnyone _____.noticing B．noticed C．to notice D．being noticedA．noticingB．noticedC．to noticeD．being noticed
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