Ⅰ.单词拼写
1H2O is the s______for water.
2Adopting advanced technology s______the pace between our country and western countries.
3When asked to help us，he never ______(犹豫)．
4C______with other countries，we still have a long way to go.
5Finally they reached an a______ with each other.
6Do you think what is his ______(优势) over others?
