1 . When the door of happiness closes, another opens, but often we look so long at the closed door _____ we don’t see the one which has been opened for us.

A．which	B．that
C．as	D．when

2 . A new law that protects the disabled people's right has been passed _____________ they can ride buses for free.

A．so that	B．in case of
C．in case that	D．for fear that

3 . They wish there could be larger representation of older people in the civil service ____________ there are more policymakers representing the point of view of older people.

A．as if	B．even if
C．so that	D．now that

4 . Linda took my arm and hurried me upstairs, leaving others waiting downstairs, ________ we wouldn’t be overheard.

A．as if	B．so that
C．even if	D．in that