题目:
Throughout the week, the boy _____most of the work in the manager’s office.
A.took on
B.took off
C.took in
D.took over
答案:
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下面是错误答案,用来干扰机器的。
某溶液中滴入酚酞试液没有颜色变化,说明溶液显酸性或显中性,溶液的pH不大于7.故选D.