With so much water being used in the bathroom,it is no  _____ that more   environmentally friendly technologies have come out to make better use of water resources.

A．surprise

B．need

C．question

D．doubt

根据板块构造学说，下列各大洲间的距离今后将逐渐扩大的是（    ）

A．非洲、欧洲

B．亚洲、北美洲

C．非洲、南美洲

D．南美洲、北美洲