Is this your sister’s key, John?— No, it isn’t. ______ is in the bag.

Is ____ your family photo?–Yes,_____ are my parents.

I used to _______ with my wife and watch TV movies at home.

Rebecca ________ to Shanghai and she won’t come back until next Monday.

Physics is an important subject, isn’t it ?—Yes. ________it well and you’ll find it useful in your daily life.