The cause he had devoted himself to________a perfect success.
| A．proving |
| B．proved |
| C．was proved |
| D．has been proved |
They haven’t seen each other for ten years, but they still keep in___contact with each other.
| A．constant |
| B．instant |
| C．content |
| D．consistent |
He was very busy that day, but he seemed ___ when we dropped by.
| A．unbearable |
| B．skeptical |
| C．delighted |
| D．challenging |
Since everyone is a little tired, shall we ___ our discussion and have some tea or coffee, please?
| A．break off |
| B．break down |
| C．break up |
| D．break into |
—Is there any possibility ___ you could pick me up at the airport?
—No problem
| A．when |
| B．whether |
| C．that |
| D．what |
When we got there, he was about to leave, so he only had time to explain ___ to us what he thought of our plan.
| A．carefully |
| B．roughly |
| C．impatiently |
| D．repeatedly |