Tony and I are good friends, but we are in different ____. A.class B. school C. grades
—Could I borrow your computer. Bob? —Sorry, I am______ it. A. taking out B. turning on C. working on
Dear students, please read every sentence carefully. The more _____ you are, the______ mistakes you'll make. A. carefully; fewer B. careful; less C. careful; fewer
Please follow _____ I say. A. what B. that C. which
—My old friend White is going to visit me. —We haven't seen each other_____ five years. A. since B after C. for
—I ______ something wrong just now. May 1 use your eraser? —Of course. Here you are. A. write B. wrote C. am writing