I.Fill in the blanks with the proper forms of the words given in the brackets.
1.College students should know the ____________(importance) of grasping a foreign language.
2.I was not feeling wel.When he asked me to do the heavy work,I showed my ______(willing).
3.It's our _______(formal) to stand up at the beginning of a class to greet the teacher.
4.We were deeply impressed by these foreign guests' ______(polite) and _______(friendly).
5.It is considered _______(appropriate) to tell such a horrible sotry to the children.
6.Please find from the text ______(properly) words to fill in these blanks.
7.The prices of daily necessities are having a ______(tend) to rise quickly nowadys.
8.What he had said _______(indication) that I was to blame.
9.We're making our efforts to creat a harmonious ________(social).
10.The boy felt quite ______(nature) when he was first introduced to that beautiful girl.