Ⅴ类洞充填备洞后时，要求()
A．严格的抗力形
B．适当的固位形
C．底平壁直
D．与牙面外形一致
E．必须做鸠尾
参考答案：B
Let's _____________ my mother cook a meal. [ ]
A. help
B. helping
C. help to
根据句意用所给词的适当形式填空。
1. Simon said he had a ________ (please) journey last week.
2. Every year many________ (tour) come to Beijing to visit the Great Wall.
3. We should work hard at English because it's important in our________ (day) life.
4. A man's life will lose its_________ (mean) if he has no interest. Do you agree with me?
5. We all think Jet Lee is a _________ (success) actor.
