He spent as much money as he could _______ a new iphone6.

They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world

All the students had gone out.There was in the classroom.

May I go swimming this afternoon — I’m afraid not _______ you have finished your homework.

______ two pandas from Chinesemainland has become ______ hot topic in Taiwan.