Please come to my party if you ____ free tomorrow.

It is said that ____ young people may lose the abilities to hear after five years if they listen to MP4 players which are too loud for more than five hours a week.

I have ________ French. What about you?

The bus hit against a tree in the fog and __________to the deep valley, with ten passengers killed and twenty wounded.

.I think ___ necessary ___ a foreign language.