The boys and girls were happily making a snowman, _______ with cold.

A．their faces red

B．their faces were red

C．their faces turned red.

D．their faces to be red

发生火警时，逃生只要跟着别人跑。以下说法正确的是（）.

A.对的

B.不对，事到临头要有主见

C.哪边人少就往哪边逃

D.只要从楼上往下跑就行