You have to be 18 years before you _________ to drive a car.

      A. are allowed   B .are   C. allowed   D. allow

You have to be 18 years before you ________ to drive a car.

A．are allowed           B．are        C．allowed        D．allow

[　　]

A. are allowed　　   B. are　　   C. allowed　　 D. allow

(用适当的的单词或短语补全对话)

A: Hi, Bob! What are you going to do during the summer vacation.

B:(1)ndline.

A: I don't think sixteen?year?olds can be allowed to drive.

B: (2)?

A: You have to be 18 years before you are allowed to drive a car.

B: (3)　?

B: People think they are not serious enough at that age. It's dangerous.

B: (4)　What shall we do then?

A: I think we can be allowed to volunteer to protect our environment.

B: (5)　Let's do it together.