—When ____your sister the computer? —Last month. A. does, buys B. did, buy C. did, buys
An ________ boy came to our class yesterday.
Some families raise cows, and _________ grow wheat.
I am a new student in this school, so I have ________ friends here.
I happened to meet an old friend of __________ in the supermarket.
We live _______ a wonderful world _______ a lot of amazing things.