1 . After the conference, the troops were sent to ________(defence) the border immediately. (所给词的适当形式填空)

2 . We have the duty ________ (defend) our motherland. (所给词的适当形式填空)

3 . It’s the duty for every soldier ________ (defend) our country against enemies. (所给词的适当形式填空)

4 . Our troops took up ________ (defend) positions on the high ground overlooking the river. (所给词的适当形式填空)

5 . The soldier ______(defence) himself from the attack and survived at last. (所给词的适当形式填空)

6 . The country put up a strong ____________ (defend) against the enemy’s invasion. (所给词的适当形式填空)

7 . They help the body ________(defence) itself against some kinds of infections. (用所给词的适当形式填空)

8 . Her body was no longer able to ________ (defence) itself against disease. (所给词的适当形式填空)

9 . They dug caves under the ground to defend themselves_________ attack. (用适当的词填空)

10 . We must take some ____________measures ____________ our country against invasion. (defence) (所给词的适当形式填空)