—What are you busy with?
—The conference in our city next week．
| A．held | B．will be held | C．being held | D．to be held |
Look over there – there’s a very long, winding path ______ up to the house.
| A．leading |
| B．leads |
| C．led |
| D．to lead |
It’s no use ______ without taking action.
| A．complain |
| B．complaining |
| C．being complained |
| D．to be complained |
Sarah pretended to be cheerful, ______ nothing about the argument.
| A．says |
| B．said |
| C．to say |
| D．saying |
The lecture, ______ at 7:00 pm last night, was followed by an observation of the moon with telescopes.
| A．starting |
| B．being starting |
| C．to start |
| D．to be started |
Marco Polo is said to have sailed on ______ Pacific Ocean on his way to Java in ______ thirteenth century.
| A．the; a |
| B．a;/ |
| C．/; the |
| D．the; the |