To make the air clean,Beijing will close some companies________cause heavy pollution.A.thatB.whoC.what
Look at the ______, sir. The white shirt is larger than the yellow one.
The red suitcase is expensive ______it’s made of leather.
Could you show me how to ________ this new recorder?
Some people think that CD-ROMs will soon be _________ books.
I didn’t _____ you were going to leave_____ 3 o’clock.