He looked around nervously to ________ that there was nobody following him.
| A．defend |
| B．confirm |
| C．doubt |
| D．insist |
The boss promised to give reward to ________can work the problem out.
| A．anyone | B．everyone | C．whoever | D．whomever |
Someone who lacks staying power and perseverance is unlikely to ________a good researcher.
A．make B．turn C．get D．grow
—Have you finished reading Jane Eyre?
—No，I ________my homework all day yesterday.
| A．was doing | B．would do |
| C．had done | D．do |
The last one ________pays the meal.
| A．arrived | B．arrives | C．to arrive | D．arriving |
She devoted herself ________to her research and it earned her a good reputation in her field.
| A．strongly | B．extremely | C．entirely | D．freely |