—Please say something about Zheng He.
—Oh! He is the Ming dynasty explorer of ______ all the Chinese are proud.
A:who
B:whom
C:whose
D:that
They arrived _________ Shanghai ________ a cold morning.
下列各句中没有语病、句意明确的一项是( )
如图,该平面展开图按虚线折叠成正方体后,相对面上两个数之和为8,则x+y=____ .
读“地球经纬网略图”(下图,虚线为极圈及回归线),回答下列各题。