Mary _______ be in the hospital. I saw her play basketball a minute ago.

What’s ____ over there(在那边)—It’s a bus.

Jim，you look sleepy. What’s wrong– I ________ late to write a report last night.

One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

How can you manage to do all these things without a rest-I prefer_______ a cup of coffee_______ me energetic.