基础检测
Ⅰ.词性转换
1．To their disappointment，Dr Wang gave a speech about the economy without even a passing ________ (refer) to the problem of unemployment.
2．There are many ________ (special) in this field who you can turn to for help.
3．Based on the wellestablished ________(observe), the children will stare longer if they do not see what they expect to see.
