Don't go to bed ______ I come home. [ ]
A. until
B. after
C. when
D. then
答案：A
用括号中所给词的适当形式填空.
1. These are my_______（parent）.
2. They are ______ ______（factory worker）.
3. She ______（be）at the library.
4. Lily ________（不会）speak Chinese.
5. They are_______ ________（ man teacher）.
方丝弓矫治器关闭间隙常用（）
A.滑动法
B.磁力
C.弹力结扎
D.关闭曲
E.以上都不对
