⑴____My parents and I go to Canada by plane．
⑵____I buy some presents for my friends．
⑶____I have a nice winter holiday．
⑷____We visit the zoo in Canada．
⑸____I like the sea and like swimming，too．
⑹____We have a good time in China．
西北地区的绿洲主要出现在（ ）
