--It is really fun to hike and I often go hiking in the forest.--But hiking alone in the f

问题补充：

--It is really fun to hike and I often go hiking in the forest.

--But hiking alone in the forest be very dangerous.

A. can

B. must

C. shall

D. will

答案：

(答案→)A. can

B. must

C. shall

D. will

解析：考查情态动词。句意是：独自在森林里远足可很危险。can可用以描述特有的行为或情形。答句的语意是向对方提醒注意。又如：It can be quite windy on the hills.山上的风就是那么大。