I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time.
A. had already been done B. has already been done
C. would be done D. have already been done
Jim won the award, _______ excited everybody in the class.
A. which B. that C. this D. it
The reason ______ he gave for being late was ______ he overslept this morning.
A. why; that B. which; that C. why; because D. which; because
In class the teacher’s humorous words often make every student ____ laughter.
A. burst into B. break into C. fall into D. come into
Look out! Don’t get too close to the house ______ roof is under repair.
A. where B. that C. whose D. which
The teacher said that Columbus _______America in 1492.
A.discovered B.found C.had discovered D.had found