study is hard work, we’d better continue to the end.

She didn’t know__________she could express her ideas clearly when she was invited to speak at the meeting.

— ______ are you going to Guangzhou?— I’m taking the plane. 

We can easily become unhappy_____ we work out our problems in our daily life. 

 Detective Lu thought that ________ Xie Yiming ________ Wang Gang were likely to kidnap Guan Fei, Guan Dawei’s son.