We had a(n) ______ with him about this problem last night

We need friends to ________, or we will feel lonely（单选）—4分

____the matter with the teacher, we had a better understanding about it

The class ____________ over, we had a ____________discussion

If a student has a problem with classroom work，he or she should______.

If a boy or a girl has grown up in a home with sharing tasks and decisions，he or she will probably______.

If Sam had enough money with him, he___________on the trip to Malaysia.

A(n) ______ is a destructive program that fills a computer system with self-replicating information，clogging the system so that its operations are slowed or stopped．

We all agree with him on _____ he said.

We all agree with him on ______ he said.

_____ that we couldn’t catch up with him.

A为n阶方阵，若存在n阶方阵B，使AB=BA=A，则_________。