As a teacher rich in experience, he knows how to _______ his ideas to these new students in a limited period of time.
To tell you the truth, I have a hard time remembering all the ______ rules of English grammar.
—You haven’t returned my chemistry textbook yet.—I know, but I ________ it for five days.
—You haven’t returned my chemistry textbook yet.
—I know, but I ________ it for five days.
David left word with my secretary ________ he would call on me in the afternoon.
Why do you turn off the light in the room? We are in total ______ now and I can’t see anything.
You’re our manager, so ______ or not you’ll attend today’s meeting is very important.