---What are you doing? ---- I am _____ a letter.A.sending B. writing C.Both A and B
What’s ____? It’s a tomato. A. this B.these
Who’s she?- She’s my ________ A.mother B. father
What are these? They are _________. A. bean B.beans
What can you see?- I can see_______ A. a potato B. potato
从选项中选出相对应的回答，把序号写在括号内。5%
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