—Oh, I’m sorry for being late.—It doesn’t matter. The film for just five minutes.A.started B.has started C.has been on
I was really too busy with my homework and I couldn't help ____________ housework.
Mary is one of the brightest students who_________ from New York University.
Mary is short__________ her brother is very tall.
--Whose advice do you think I should take? --___________.
__________ you understand the rule, you will have no further difficulty.