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—Was it necessary ______ John ______ some photos before helping the old man?
—I think so. In this way, he could protect himself later.
A.of; taking
B.for; taking
C.of; to take
D.for; to take
—I think so. In this way, he could protect himself later.
A.of; taking
B.for; taking
C.of; to take
D.for; to take
答案：
D
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