17. They can't be working now. It's time they ________ the office.
| A．have left | B．would leave | C．could leave | D．left |
Hangzhou is a famous city in China, many people come to buy tea.
| A．when | B．that |
| C．where | D．which |
As is known to all, Diaoyu Island China .
| A．belonging to | B．belonged to |
| C．is belonged to | D．belongs to |
---What did our teacher do?
---He raised his arm as a(n)for us to stop.
| A．signal | B．advice |
| C．evidence | D．design |
I hope, first of all, that we shall never lose heart in face of failure.
| A．the; a | B．the; the |
| C．不填; 不填 | D．a; 不填 |
The company was named Gates Hall ______ a man named James Gates.
| A．in need of | B．in search of |
| C．with the help of | D．in memory of |