To be an astronaut, you must not only be strong in mind, but also be sound mentally and___

The film is really wonderful.It’s such a long time ________ I enjoyed myself so much.[ ]

I don’tknow if Mr. Li ____ to the party this evening.–I think he will come if he ____ free.

Have you decided where to spend your summer holiday?—Not yet. We _________ go to Qingdao.

The price of that house is too _______.I can’t afford it