Are you behind the tree?______ A.Yes,I'm. B.No,I'm. C.Yes,I am.
What are you going to do _____ Saturday morning ? A.in B.on C.at
I’m going to ____ a trip. A.take B.has C.having
I’m going ____ visit my grandparents. A. and B. to C.with
I’m going ____ train. A. by B. on C. At
They’re going to Beijing _____ next week . A. in B. at C. /