1. Shut the door after you _____ you go out.

A. after              B. as if                C. when               D. while

2. Travelling is difficult _____ you’re carrying two small children and a heavy suitcase.

A. unless          B. until                 C. before                D. when

3. _____ we ever meet again I hope he remembers to thank me.

A. If and when  B. When and where  C. If and what     D. When and how

4. There have been less accidents on this road _____ the speed limit was introduced.

A. when                   B. while               C. after          D. since

5. I don’t know why, but I took a strong dislike to him _____ I saw him.

A. as soon as      B. as much as        C. as often as          D. as far as

6. However, US speakers often use “may” _____ British English uses “can”.

A. since             B. because           C. where                D. unless