The number of people who were killed______more than 400,000. A great number of them ______the old people and children.[      ]

A. was; were

B. was; was

C. were; were

D. were; was

我国西部地区四大气区是：   （    ）

A．新疆、青海、川渝、鄂尔多斯

B．西藏、新疆、青海、四川

C．新疆、西藏、青海、川渝

D．青海、云南、四川、鄂尔多斯