(2013·兰州名校二模)She will tell us why she feels so strongly that each of us has a role ________ in making the earth a better place to live in.

A．to have played

B．played

C．playing

D．to play

对公通存通兑业务使用的凭证主要包括：（）。

A、实时通付款凭证

B、支票

C、中国银行批准的其他支付凭证

D、存单