一What time is it?
一____(7 o'clock,time,breakfast)
Let's eat beef dumplings.We are short mutton.
世界上最大的淡水湖群是( )
下列说法中正确的有( )①延长直线AB ②延长线段AB ③延长射线AB ④画直线AB=5cm ⑤在射线AB上截取线段AC,使AC=5cm
处于地球最南端的大洲是( )