________ twice, the postman refused to deliver our letters unless we chained our dog.
| A．Having bitten | B．Being bitten | C．Bitten | D．To be bitten |
He wrote a letter ___he explained what had happened in the accident.
| A．what | B．which |
| C．where | D．when |
China’s education reforms aim to better develop students’ ability to think _____.
| A．independently | B．steadily |
| C．negatively | D．particularly |
—Honey ,this is a present for your birthday.
— Ah ! A pair of shoes ,Nike! I think they __comfortably.
| A．wear | B．are worn |
| C．are wearing | D．have worn |
David is ___ animal fur ,so he won’t visit anyone who has cats or dogs in the house .
| A．curious about | B．allergic to |
| C．satisfied with | D．fond of |
while intelligent people can often ____ the complex ,a fool is more likely to complicate the simple .
| A．sacrifice | B．substitute |
| C．simplify | D．survive |