用方框中所给的词的适当形式填空tell thousand collect take safe1We should enc

用方框中所给的词的适当形式填空
tell thousand collect take safe
1We should encourage teenagers ----------- part in school activities.
2How long have you ------------ the stamps?
For two yesrs
3Swimming in the river alone isn't -------,so you must keep away from it.
4------------- of students hane listened to the famous speech in the hall.
5I choose -------him the truth