【推荐1】Introverts (性格内向的人), according to Susan Cain, tend to enjoy being alone, doing quieter things or being with just one friend at a time. She says that is _____ they get their energy.

A．why

B．when

C．how

D．where

【推荐2】You are saying that women should stay at home rather than going out to work, and this is _____ I disagree.

A．where	B．what
C．why	D．that

【推荐3】It is universally acknowledged that money flows to ________ it is that controls the scarce thing.

A．whom

B．whomever

C．who

D．whoever