Joanna is no less hardworking than her twin sister, _______ she failed in the final exam.
| A．but | B．so | C．or | D．and |
The UN is trying to ______ the world ________ hunger.
| A．get rid of; by | B．rid; of | C．be rid of ;by | D．get rid; of |
Only after I read the text over again _____ its main idea.
| A．that I knew | B．did I know | C．I could know | D．I did know |
To the surprise of many people, in ten years the city’s population _______ by 12%.
| A．gained | B．expanded | C．developed | D．spread |