单选题
The conversation had been (carried on) chiefly (in French), a language (which) Jerry was (perfectly) acquainted.
A、
carried on
B、
in French
C、
which
D、
perfectly
【正确答案】
C
【答案解析】
应改为with which。be acquainted with为固定搭配，意为“对…熟悉”。
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