Traveling to Hainan by air from here______ about 2 hours and _______ about 1000 yuan.

I’m not sure ___ I can learn at present; but I’m sure it will be something ___ I might use in the future.

The woman______ clothes in the supermarket was taken away by a policeman

Are these books ________—No, they are not mine. They belong to _______ .

______a mobile phone can you ring _______you want to talk with anywhere.