—Our teachers and parents always warn us not to smoke.—Yes, actually, the risk of heart disease is a powerful argument ____ smoking.
___ from a plane, the Great Wall looks like a huge dragon.
Africa is actually connected with Asia at the spot ___ the Suez Canel was dug.
Many buildings ___ in the eathquake.
Some weak bridge may not ___ in an earthquake. A,stay up B. fall down C. fell down D. fell off
Do remember or wash the vegetables ___.