—Mark,you look so tired.—Oh,I didn’t go to bed________it was 12 o’clock last night.
________ giant pandas is getting _________ because their living areas are becoming farmlands
— Look! The girl with long hair is making a snowman. Is she Sandy?— It __________ be her. I’m not sure.
Would you please ________ the children ________ with fire?
They need ______ at the hotel for _________ because of the bad weather. A stay; short stay B staying; a short stay C to stay; a short stay D to stay; short stay
The forests are getting fewer and fewer. We must _________ down too many trees.