It is no use________without doing.
| A．to promise | B．promising |
| C．promise | D．to be promised |
He often helps the students __________ he thinks are notquick at their studies.
| A．whom | B．who | C．when | D．because |
It's the third time __________ late this month.
| A．that you arrived |
| B．when you arrived |
| C．that you've arrived |
| D．when you've arrived |
Thenewly-built cafe, the walls of __________ are painted light green, is really a peaceful place for us, especially after hard work.
| A．that | B．it | C．what | D．which |
Antarctic __________ we know very little is covered withthick ice all the year round.
| A．in which | B．where | C．that | D．about which |
The train __________ she was travelling was late.
| A．which | B．what | C．on which | D．in that |