I'm sure Tom is at home because I've seen him ________ upstairs.

[　　]

－I came to your office yesterday morning, but nobody was in.

－Oh, we ________ a meeting in the meeting room.

[　　]

－It's said all the hotels are filled with tourists.

－Don't worry! I ________ a room in Pengfei Hotel.

[　　]

Bruce is standing ________ the wall because he is ________ tired.

[　　]

－What will the weather be like in the northwest of China tomorrow?

－Look at the map. It will be ________.

[　　]

－It took me nearly 40 minutes to ride here.

－Have a drink, please. You ________ be thirsty.

[　　]

If you want a ticket for a round-trip, you'll have to pay ________ $150.

[　　]

The digital camera is not hard to use at all. ________ can learn to use it in a short time.

[　　]

________ we had seen all the animals, we went home.

[　　]

－His French is very good. Can you tell me who taught him?

－Nobody. He taught ________.

[　　]