选择正确的答句。(1)How long is the Great Wall?(2)How old are you?(3)Can we walk along all of the Great Wall?(4)What is he doing?
Chinese people invented paper _____printing. A. andB. but
Yesterday I ______ my room. A. cleanB. cleaned
Thank you _______ your letter. A. forB. to
A: Happy birthday to you! B:______ A.OK!B. Thank you !
给左边的句子选择正确的答语。