11.Radium was ___________(发现) by Madam Curie.

10.I have _________(困难) in working out this problem. --- Can you help me out ?

9.Do you know the ____________ between AE and BE?(差别,不同)

8.To learn English well, you should have a ___________.(词典)

7.The postman's job is to have the letters ___________.(递送)

6.He has developed a good habit of keeping a ____(日记) every day from his childhood.

5.Having failed in the English exam many times, he made a_____(决定)to study hard.

4.The patient lost a lot of blood, so now he is in ______.(危险)

3.This food tastes ______, so would you like to have a try?(美味的)

2.To _______ our country is the duty of each citizen.(保卫)