Ⅰ.完成句子
1．________________________ (如果他在这儿)，he might be able to help us.
2．________________________ the test (如果我考试不及格)，I would have to take it again at the end of the term.
3．________________________ (如果你早一点告诉我)，I would not have let him go.
4．__________________________________________ (如果你坐这班火车)，you would get there much sooner.
5．________________________________________ (如果你和我们一块去爬山)，you would have enjoyed the beauty of nature.
