my sister bought this pair last month .这句话为什么不在时间前面加上介词on

那I bought present ( ) my sister yesterday.填什么? I bought a hat for my sister 的同义句 Whose book is this,It’s _.My parents bought it for my sister and me. 翻译.I bought my sister a present ,but she didn't like it. My sister bought some story-books in the bookstore 的问句是什么? My sister bought (she) a beauiful last Sunday she的形式 my sister bought this pair last month .这句话为什么不在时间前面加上介词on My sister bought this pair( last mouth)对打括号部分提问 my sister bought a red dress yesterday.a red dress划线提问今天就要用 I bought a toy () for my sister yesterday首字母为h I bought a toy 什么 my sister.A.to B.for C.on有人知道吗 I bought a hat my sister.A...for B...on C...in D...with I bought a s___ for my sister when I was in Beijing My oarents bought a computer ___ over 10,000 yuan ___ my sister.(fill in the blank) lt's red.thi my arm. 用所给词填空My sister plans to open her (o )clothing store.l bought a (c )shirt yesterday.Mum bought me a (s )blouse. My sister bought a present ( ) meA for B to我知道选A,可是为什么不知道 yesterday after school,I went to downtown with my sister,and we bought four pillows for our sofa.