题目内容
用恰当的介词或副词完成下列句子
Most parents are proud ________ their children．
People look ________ to him as an example of a devoted man．
I can’t work next week．Will you switch ________ me?
Sending a man ________ space was a dream for China for many years．
The grey squirrel was introduced ________ Britain from North America．
