单选题
What a great weight the mother felt ______ her mind the moment she found her lost son!
A. turned off B. taken off
C. set free D. brought into
A
B
C
D
【正确答案】
B
【答案解析】
句意为：当这个母亲找到走失的儿子时，她卸下了沉重的思想负担。
take off：把……．从……取下，除去
turn off：关掉电灯，电视
set free：释放，给予自由
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