轻度错牙合与功能发育影响不大者，可在此期暂不作治疗。应是哪一期 （）
A.替牙期
B.恒牙早期
C.恒牙期
D.青春期
E.成人期
参考答案：A
关于三角形的内角，下列判断不正确的是（ ）
A．至少有两个锐角
B．最多有一个直角
C．必有一个角大于60°
D．至少有一个角不小于60°
句型转换，每空一词。
1. Wang Lin is tall and a little bit thin. (就划线部分提问)
What _______ Wang Lin ______ _______?
2. How tall is he?(改为同义句)
______ is his ____ ?
3. Don't forget to close the door before you leave. (改为同义句)
______ to close the door before you leave.
4. She has straight black hair. (改为一般疑问句)
_____ she ______ straight black hair?
5. Everybody in our class likes pop music. (改为否定句)
______ in our class ______ pop music.
