15. A world-famous ballet company’s 42-year absence from Beijing will end it brings a new production to the stage this week.
| A．since | B．when | C．unless | D．until |
Jessie, my best friend _______ me of some really bad things just to hurt me. I felt betrayed.
| A．accused | B．informed | C．reminded | D．warned |
twice a year, whether it is a car ,a bus or a truck, is the rule that every driver must obey in this city.
| A．Examining | B．Examined |
| C．Being examined | D．Having been examined |
to his scientific research, the professor cared little about his family.
| A．Devoting | B．Devoted | C．Having devoted | D．To devote |
Simon made a big bamboo box _______ the little sick bird till it could fly.
| A．keep | B．kept | C．keeping | D．to keep |
what their friendships are based upon, the important thing to remember is both of them are friendships.
| A．Regardless that | B．Regardless of, that |
| C．Though, / | D．Despite, what |