Hasn’t Zhao Wei finished filming the movie So Young?— YesShe ______ on it for more than half a year

Anne couldn’t concentrate ______what she was doing while her friends were playing cards.

I took my driving license with me on holiday，________I wanted to hire a car.

I could hardly recognize your son.________I met him, he was only a little child.[ ]

Carl is starting college in September ______, he’s traveling around Europe