As a teenager，our son should have two or three hobbies to be really happy—________，but how can he afford the time with so much homework every day

Frank thinks math is easy, ______ I think it’s difficult.

She has good eyesight. She can see ____ the distant island in the sea.

Would you like to go camping with me when the summer holiday comes?—I really dislike camping, but I will ______ you if you insist. [ ]

That doesn’t sound very frightening, Paul, I’ve seen_________. What did you like most about the film?