--How old _____ you? --I am twelve. A. am B. are C. is
Come _____ , please！A. in B. of
It ______ warm yesterday.A. is B. was
The children ran away. _____ I cried.A. so B. Then
Chinese people invented paper _____printing.A. and B. but
Yesterday I ______ my room.A. clean B. cleaned
--How old _____ you? --I am twelve.
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