The magician picked several persons from the audience and asked them to help him with the performance.
| A．by accident | B．on occasion | C．at random | D．on an average |
His English is very poor.He can’t make himself ___.
| A．understand | B．understood | C．understanding | D．to understand |
16.Nobody knows who is the first one to add fertilizer ___ the soil to make plants grow better.
| A．to | B．in | C．into | D．on |
It was five o’clock.The battle is still ___.
| A．in | B．on | C．over | D．beneath |
14.Tom’s elder sister is only one year ___ than he.
| A．elder | B．older | C．more elder | D．more older |
Tom’s father burst out ___ when he saw Tom eating candy happily in the police refuge for lost children.
| A．tears | B．tear | C．tearing | D．crying |