小雪想说：“我的电脑是蓝色的。”她应这样说：________A．My blue is computer.B．My computer is blue.
Chinese people invented paper _____printing.A. and B. but
Yesterday I ______ my room.A. clean B. cleaned
Thank you _______ your letter.A. for B. 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。
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