Ⅰ. 根据语境及括号内所给单词的提示填空。
1. Thousands of ________ (ant) live together in holes in the ground.
2. Last week Jean ________(fail) the job interview because of her poor English.
3. As we know, flies are harmful ________ (insect). People hate them.
4. The doctors can’t say ________ (exact) what’s wrong with my mother.
5. My teacher’s simple words “Take it easy.” made me feel less nervous before the final ________ (examination).