—In the old days, most teenagers had to work for the landlord (地主) in the field to help _____ their families, because their families couldn’t _____ an education for them.—What a pity!A.afford; supportB.support; affordC.afford; give
Oh, my God! I can ______ put on my trousers. I must be getting heavier.
—Could I invite my friends to my birthday party?—Sorry, you ______.
Our math teacher is very kind ______ he looks very serious.
This isn’t my sister’s skirt. ______ is blue.
Now the air in our city is ______ than it used to be. Something must be done to stop it.