1 . We were having an evening class __________ the light went out.

A．while	B．even if
C．as if	D．when

2 . In our city, citizens have free _____ to the library, which makes it easy for them to read any book they like.

A．time

B．entrance

C．charge

D．access

3 . _______ I met him, I thought he was a serious man.

A．For the first time	B．The first time
C．It was the first time	D．By the first time