I _______the number down ____a piece of paper.A.am writting,onB.am writting ,inC.am writing ,onD.am writing,in

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I _______the number down ____a piece of paper.A.am writting,onB.am writting ,inC.am writing ,onD.am writing,in
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I _______the number down ____a piece of paper.A.am writting,onB.am writting ,inC.am writing ,onD.am writing,in
I _______the number down ____a piece of paper.
A.am writting,on
B.am writting ,in
C.am writing ,on
D.am writing,in

I _______the number down ____a piece of paper.A.am writting,onB.am writting ,inC.am writing ,onD.am writing,in
“写”的-ing形式不用双写t
所以排除A,B.
又,把……写在报纸上用介词in,这是固定搭配.所以选D

a

C,A的writing的分词形式不对,不用双写t。只有c是正确答案。

选C
现在进行时 用的是be doing sth
其次 write以e结尾
所以去掉e 加上ing
write on 写在...上
所以答案是C

c

D

选C

a,c