–Have all the boys known that they ______ an English test this afternoon?--Yes. Every boy has been told about it.
I find _______ difficult to finish the work on time. We only have three hours left.
—What are you looking for? —I’m looking for the watch _______ I bought yesterday. A.which B.who C.whose
—Which season do you like _______, summer or winter? — Summer. A.well B.best C.better
—It’s too late. I have to go now. —Oh, it’s raining outside. Don’t leave _______it stops. A.since B.until C.while
When Jim’s mother came in, he _______ his homework. A.is doing B.has done C.was doing