根据句意及汉语提示,用短语的恰当形式完成下列句子
小题1:I _____ (熬夜)yesterday, because there was lots of homework to do.
小题2:________, (使我们吃惊的是)Tom who never learns English, got the highest score in the class in the first-month exams.
小题3:He ______(更喜欢)stay at home rather than go out if let him choose.
小题4:I have to set out to see a doctor ________ (因为)headache now.
小题5:We have _______ (成功) finishing the task that our boss asked us to do.