--- Listen! David is talking happily with his mother in the next room.--- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
The music_______ is quiet and gentle always makes me comfortable
Do you know_____ ? Sorry,I’ve no idea.
Where is your mother? She_____________ Shanghai on business for a few days..
Where has your father gone? He has gone to Shanghai.And he’ll ______for three days.
Who will teach you to play basketball this summer. The twins.Because_____ Jim______Jam play it very well.