( ) David likes________ model planes, ________ Mike doesn’t. A. make; but B. making; but C. make; and
I really don't know________. A.what to do it B.where to do C.what to do
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