1．Why does the type of computer sell so well?

A．Because it’s convenient．

B．Because it’s not too expensive．

C．Both A and B．

2．Why do people prefer fast food?

A．Because fast food tastes good．

B．Because fast food saves time．

C．Because fast food saves money．

3．How did the man go to work before?

A．By bus．     B．By taxi．     C．On foot．