题目内容：

(B) 根据句意，在答题卡对应题号的横线上，写出括号内所给单词的适当形式。

1.Those who call ________ (they) net addicts(网虫) spend at least 6 hours online every day.

2.Some movies come and go, but some classical ones never seem to become________ (know).

3.As people are aging, they feel even ________ (lonely).

4.Drivers are always asked to avoid ________ (care) while driving on the road.