Boys in early adolescence are not _________ to the cinema because the film is not suitable for them.

---I heard that you made a bicycle trip to the 2010 World Expo of Shanghai alone.---No. Actually, my friend Bob ________ me.

Peter ________ be really difficult at times even though he's a nice person in general.

Surfing the Internet is ___ a kind of relaxation, ____ our knowledge.

－What do you think of the speech given by the president?－I like_________of what he said.