题目内容：

用方框中所给单词的适当形式填空，每个词限用一次。(5分)

pack    he    careful    invite    allow

1. Beijing is cold at this time of year .You need to ________warm clothes if you go there .

2. Be ________of the dog that does not bark.

3. John cooked dinner for ______when he stayed at home alone.

4. If he _______ me to go to his party, I’ll go and give him a gift, of course.

5. You have to be 18years old before you are ________to drive a car.