英语语法易错题——状语从句（有详解）
 
以下试题均涉及状语从句，但它们均在某个方面很容易出错，看看你能不能做对它们：
1. Don’t be afraid of asking for help _______ it is needed.
A. unless                                                  B. since
C. although                                               D. when
2. A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.
A. when                                                   B. unless
C. after                                                    D. until
3. _______ I know the money is safe, I shall not worry about it.
A. Even though                                         B. Unless
C. As long as                                            D. while
4 You will succeed in the end ____ you give up halfway.
A. even if                                                 B. as though
C. as long as                                             D. unless
5. “Was his father very strict with him when he was at school?” “Yes. He had never praised him _______ he became one of the top students in his grade.”
A. after                                                    B. unless
C. until                                                     D. when
6. _____ I suggest, he always disagrees.
A. However                                              B. Whatever
C. Whichever                                            D. Whoever
7. You should put on the notices ______ all the people may see them.
A. where                                                  B. in which
C. at                                                        D. for them
8. _____ she goes, there are crowds of people waiting to see her.
A. Wherever                                             B. However
C. Whichever                                            D. Whoever
9. Mary clapped her hand over her mouth _______ she realized what she had said.
A. while                                                   B. as soon as