1 . My cousin promised his mother never to lie to her, _______, he did so again. (用适当的词填空)

2 . The devoted mother is greatly concerned with her children, ________, she has won great success in educating them. (用适当的词填空)

3 . Playing on a frozen sports field sounds like a lot of fun. Isn’t it rather risky, ________? (用适当的词填空)

4 . He was ____________ eager to know the result of the examination. (用适当的词填空)

5 . It is generally believed that you can’t be ____________careful when crossing the street. (用适当的词填空)

6 . When the passengers get off the bus, they are reminded not to leave any of their belongings   ________. (用适当的词填空)

7 . He didn’t care about his son, let ______ his parents. (用适当的词填空)

8 . We do eye exercises ________ a day to protect our eyes. (two) (所给词的适当形式填空)

9 . Since after-class activities will not ________(mere) make your school life colorful but also improve your learning, why not take an active part in them? (所给词的适当形式填空)

10 . Having given _______ some national secrets to the enemy, the man was sentenced to prison. (用适当的词填空)