问题
.No matter how fast we worked,____.
A:we couldn’t catch up with them
B:and we couldn’t catch up with them
C:so we couldn’t catch up with them
D:but we couldn’t catch up with them
B:and we couldn’t catch up with them
C:so we couldn’t catch up with them
D:but we couldn’t catch up with them
正确答案是：
同类题型
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