课时作业4
Ⅰ.根据提示写出单词的正确形式
1．He has had some ________ (disturb)experiences.
2．It is the high reward that ________ (motivate)them to work even harder to find the answer.
3．There's a shortage of ________ (skill) labour in the factory.
4．These prices are ________(effect) from April 1st.
