The last bus has left．What should we do？

Let's take a taxi．We have no other now．（　　）

A．choiceB．reasonC．habit

On the way to Mount Heng，the scenery was so beautiful that all of us lost in it．（　　）

A．myselfB．themselvesC．ourselves

Hi．Andy!There are floors in this building．Which floor do you live on？

I live on the floor．（　　）

A．thirty； twenty﹣second

B．thirty； twenty﹣two

C．thirtieth； twenty﹣two

Mom， I visit the Science Museum tomorrow？

I'm afraid you can't．It is closed on Monday．（　　）

A．mustB．mayC．should

Bob is a smart boss!

Yes，so he is．He knows how to cut the cost of the project．And he always does the work with money and people．（　　）

A．less； lessB．fewer； less

C．less； fewer