A:Is this your pen?B:________ .A.No, it is B.Yes, is this C.No, it isn't
—What’s he doing? —He’s _________ books. A.read B.reading C.reads
I like _________ best, because it’s hot, I can swim and eat ice cream. A.fall B.summer C.spring
—Where does the rain come from? —It comes from the______. A.soil B.clouds C.sun
Stop at a _________ light. A.red B.yellow C.green
An elephant is much _________ than a mouse. A.longer B.bigger C.smaller