No bread eaten by man is so sweet as ______earned by his own labour.
| A． one | B．those | C．it | D．that |
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 |
The other scientists ______ to her ideas with a mixture of criticism and silence.
| A．agreed |
| B．reacted |
| C．approved |
| D．commented |