结合漫画中母女的对话,你认为孝顺父母就应当(　　)

①帮父母做些简单的家务,在他们生病的时候帮他们买药做饭

②尊重父母的意见,爱父母

③感恩父母,百依百顺

④每天陪着父母

A．①③

B．①②

C．②④

D．③④

It is known to us that it was such great efforts _____________ all the Chinese athletes had made _________ helped them get 51 gold medals in the 2008 Beijing Olympic Games.

A．as, that

B．that, which

C．that, as

D．which, which