____paragraph is a group of sentences about some related subject. Readers must know what the main idea of ___paragaph is in order to understand ___information they are reading.

A．The ,a ,the

B．A,the ,the

C．A,a the

D．The ,the ,the

Whenever possible, Mr Smith             how well he speaks Spanish.

A．shows up

B．shows around

C．shows off

D．shows out