The students in the higher gradesI met in a football game are my good friends now.
A. when B. which C. who
—I have to be off right now.
—What a pity! Iyou could stay a little longer with us.
A. think B. am thinking C. thought
The old man asked the girl to take another seathe wanted to sit next to his wife.
A. because B. so that C. so
I'm sorry to have you waiting so long for Marcia, and I'm afraid it'll be ten minutes she comes back.
A. beforeB. afterC. until
—Oil is everywhere in this store, so you know smoking is forbidden here.
—I’m sorry.
A. can B. may C. must