— What _____?— They’re rulers.A. is this B. are they C. is these
He's busy________ English. A.learn B.learning C.to learn
Why________read books? A.not to B.don't C.not
Teachers taught us________many ways. A.in B.at C.from
Her studies in Middle School________coming to an end. A.am B.is C.are
We should help________ animals. A.protect to B.protecting C.to protect