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单选题

______ they are twin sisters, they don ’t look like each other.

A
Because
B
Since
C
Though
D
However

题目答案

C

答案解析

暂无解析
举一反三
单选题

—Have you finished the work?

—Not yet, but no matter how hard it is, we'll keep ___ until we make it.

A
failed
B
trying
C
tried
D
failing

题目答案

B

答案解析

暂无解析