I___________ toward the door to go outside when suddenly Jim opened it unexpectedly.
A.had been waking B.had walked C.walked D.was walking
Mr. Brown arranged for the taxi to come at eight ___________ he could arrive at the airport on time.
A.in case B.even if C.so that D.as though
—Why can't you go with me to the National Museum?
—I ___________ an essay all the morning and haven't finished yet.
A. write B. had written
C. will write D. have been writing
Sometimes it seems that doors ___________ be closed for you, but remember, they are not all locked.
A.must B.should C.may D.need
___________truly changes the world is the way you look at yourself.
A.When B.What C.Who D.How
—Would you like to come to the party?
—I'd love to, ___________ I have to attend a lecture.
A.and B.but C.for D.so
