________spending our vacation in a noisy crowded city,why not try hiking in the country?

Eric, isn’t this book yours?—Yes, it used to belong to _________, but from now on it isn’t.

Tom will call me as soon as he ______ home.

Mr Li, I found a watch on the playground.-You should try to find out ______.

Don’t worry about , mum. I’m old enough to look after .