【題目】________ her grandma before, he didn’t know she was his grandma even if his mother had told him.

A．Not being seenB．Not having seen

C．Having not seenD．Not seeing

【答案】B

【解析】句意：因以前沒(méi)見(jiàn)過(guò)她的奶奶，他不知道她是他奶奶即便他的母親已經(jīng)告訴過(guò)他了。否定詞not要放在非謂語(yǔ)動(dòng)詞的前面，排除C選項(xiàng)；本句的主語(yǔ)是he，與see之間是主動(dòng)關(guān)系，排除A；由于see 與didn’t know兩個(gè)動(dòng)作有先后，故選B。

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