Mark needs to learn Chinese _______ his company is opening a branch in Beijing.

The Smiths enjoy______ photos. They always go out with their cameras .

What were you doing when we were playing basketball yesterday afternoon–I the classroom.

Is the woman _______ singing in the hall you music teacherOh, it ________ be her. She is ill at home today.

Can I bring a friend to your birthday party—Sure, ______.