I had asked everyone to submit a brief introduction ahead of time.
A. 我曾要求大家提前把简介提出来。
B. 我以前要求每个人提前提交简介。
C. 我曾要求大家提前把简介提交上来。
D. 我以前要求每个人服从把简介提交上来。
查看答案
Business trends (趋势) are rapidly ______(identify) by this system.
They spent their weekends in __________ (look after)the old man.
A lot of young people______ (enter) the labor market each year.
The train arrived______ (on schedule).
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