—What do you use the box_____?
—I use it_____keep pencils,rulers,pens and so on.
A.to, to B.to, for C.for, to
New York is one of ____ in the world.
A. the large city B. the largest cities. C.the largest city
—Tom must be at home because the light in his house is on.
—He ____ be at home, because I saw him playing basketball on the playground.
A. must B. can’t C. mustn’t
Tom didn’t go hiking with his classmates ____ his illness.
A. because B. because of C. as
Michael hates to go to the hospital, because he is afraid of taking _____medicine.
A. sweet B. bitter C. delicious
Helen is 15 years old, and Joan is 15, too. So Helen is ____ Joan.
A. so old as B. as older as C. as old as