Now most families have only one child _____ our country’s one-child policy.
I used to early,but now I am used to late.
-- ______ does your sister study for the English exam? --By asking her teacher for help.
Don’t worry. Our teacher will come to show us ______the computer.
If I you,I buy a bike for him.
--Do you know the girl is talking to your teacher? ---She is my new classmate Sarah.