问题
It is hard for the Greek government to get over the present difficulties ______ it gets more financial support from the European Union.[ ]
A: if
B: unless
C: because
D: since
B: unless
C: because
D: since
正确答案是：
同类题型
Why do you look worried?—There are so many problems_______.[ ]
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He told his friends that he ___ what he was reading at the same time the day before