The factory used 65 percent of the raw materials, the rest of which __________ saved for other purposes.
—Where did you get to know her? —It was on the farm _________ we worked.
My English teacher’s humor was ___make every student burst into laughter.
---Is Jack on duty today? ---It ________ be him. It's his turn tomorrow.
—Have you handed in your schoolwork yet? —Yes, I have. I guess it ______ now.
in the mountains for two weeks, the two bous were finally saved by the local police.