问题

you known each other for long—Not very long, __________ we started towork in the company.
A:after
B:before
C:when
D:since
B:before
C:when
D:since
正确答案是:
同类题型
Everyone doesn’t agree to the plan Some support itwhile I’m one of ______ opposed to it
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was_____ to win the 100-meter race, but he fell to the ground and missed the chance.
When we write our homework on the computer, we should _____ first.