Barack Obama delivered a speech to 500 local youths during his visit to China, many of ____ from Fudan University and Tongji University.
To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.
—Now the weight. Only 115. You’d better put on a few pounds.—Well, actually, I ________ like a horse.
I can hardly remember any occasions _______ I get caught in a traffic jam in our town.
—Where have you been all day?—I _______ some former classmates and I couldn’t get back until it was dark.
The process of producing electricity may also give out CO2, _______ you heat your house with electricity instead of charcoal.