问题

_____ they are very tired, theyfeel happy because they’ve finally finished theirproject.
A: So
B: Although
C:If
D: But
B: Although
C:If
D: But
正确答案是:
同类题型
They often _______their friends at weekendsand they always have a good time.
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However, happened later proved me wrong.
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When you’re learning English, use it, _________ you’ll forget it.