6. --- I don’t know ______ I can improve my English. --- You can read some English books and magazines.
My bike is broken. It needs _________ .
My mom is from Germany and my father is from______ .
This is your classroom. __________ is next door.
---- Is that man Mr. Zhang?---- It ______ be him. He has gone to Beijing for the meeting.
My family are going on a trip to Qingdao as soon as we _________ the holiday.