Come nad see me whenever _____________.
Many students are _____ chatting online, which wastes them plenty of time.
It is the most instructive lecture that _____ Isince I came to thisschool.
Everyclassroom in this modern school is __________ with a new computer.
Nowhere else in the world __________ more attractive scenery than in Switzerland.
I'm calling to enquire about the position __________ in yesterday's China Daily.