Did you ask the teacher what _____ thisafternoon

What have you learned from your experience in Thailand?—Well, meeting people from another culture ______ be very difficult．

－Shall we goand have a picnic at the weekend—________ It is said there might be snow then

We must try our best to stop the pollutionahappier life.

The Chinese ______ Mo Yan won the 2012 Nobel Prize in literature (诺贝尔文学奖).