Since he came to Cangxi Middle School, he has made many friends, _______ makes his life rich and meaningful.
More than one teacher _____ told him it is important that he learn English well if he _____ aboard.
The meeting was _____ at ten o’clock, but the chairman hadn’t turned up by eleven o’clock.
The last half of the nineteenth century _____ the steady improvement in the means of travel.
Once environment damage _____, it takes many years for the system to recover.
As _____ announced in today's papers, the Shanghai Export Commoditiser Fair is also open on Sunday.