It is the first time I ____ to visit the Great Wall.

I want to be an astronaut like Yang Liwei when I grow up.—That sounds ____. I hope your dream can come true.

I find _______difficult to get to sleep because the man upstairs made much noise.

Can you tell me _______to talk to and ________to get help when we have problems?

Next to the hotel is a small house ______ an interesting garden.[ ]