He is only _______ boy. He isn’t old enough to take care of himself.
Chinese students often give small gifts or cards to their teachers on Teachers’ day to let them know _____. A.how great they are B.how great are they C.what great they are
Tom found _____ difficult to learn chemistry well. A.it B.that C its
Our English teacher said _____ English well was very important. A.learn B.learning C.learned
—Don’t throw stones at the animals in the zoo.—_____. A.No, I won’t. B.Yes, I will. C.Yes, I do.
The doctor warned my father _____. A.to smoke B.not smoking C.not to smoke