【单选题】
To qualify for a promotion, （）to exceed the quota.
To qualify for a promotion, （）to exceed the quota.
A、 the best thing he could do was
B、 he did his best
C、 all he could do was
D、 his best thing was
题目答案
答案解析
略
略
A、 the best thing he could do was
B、 he did his best
C、 all he could do was
D、 his best thing was