单选题
"Somebody saw David ______ an old, deserted mansion this morning." "Oh, he was also noticed ______ smuggling trade there."
A、
[A] enter, do
B、
[B] entered, to do
C、
[C] enter, to do
【正确答案】
C
【答案解析】
[解析] see与notice都是要求用不带to的不定式作其宾语补足语的动词,在主动语态中,to要省略,在被动语态中,to要加上。
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