Small _____ it is, the pen is a most useful tool.
| A．because | B．so | C．if | D．as |
We have brought in a good grain harvest for three years_________.
| A．on purpose | B．on end | C．on duty | D．on watch |
The security judge was very _________ when she explained that the driving licence was necessary for her work .
| A．reasonable | B．natural | C．ridiculous | D．available |
His brother aims to be __________ of his parents by the time he is twenty.
| A．innocent | B．beneficial | C．invisible | D．independent |
With everything arranged properly, the project is surely to _________ smoothly as planned step by step.
| A．improve | B．increase | C．progress | D．occur |
The little girl ________ to be a good singer if she gets good training in a music school.
| A．wishes | B．expects | C．promises | D．hopes |