We hadn’t plan to meet. We met ____ chance.
–Mom, must I stay there the whole day?--No, you______. You ____ come back after lunch, if you like.
–What was your brother doing at this time yesterday?-- He was reading a magazine ________ I was writing an e-mail at home.
–Is Lucy or Lily the ______ of the twins?--Lucy. She was born half an hour earlier.
–Your coat looks very nice. What’s it made______?--Cotton, and it is made ______ Wuhan.
–Which is the smallest number of the four?--________.