根据要求进行句型转换，每空一词。（本题有10空格, 每空0.5分，共5分）
（1）、It takes about half an hour to reach Beijing by plane. (对划线部分提问 )
does it to reach Beijing by plane?
（2）、I believe they are visiting us this Sunday．( 改为否定句 )
I believe they visiting us this Sunday．
（3）、--Can you go to the mall with me this week? ( 作肯定回答 )
—Sure， ．
（4）、It took me two hours to finish the project yesterday.( 改同义句)
I two hours the project yesterday.
