________ stopping polluting the earth ________ hope to live in a better environment.
| A．Only to; we can | B．Only to; can we |
| C．Only by; can we | D．Only by; we can |
34. He quickly adapted himself to ____in the countryside.
| A．live | B．living | C．be living | D．Lived |
33. Reading aloud in the morning is _____ to learning a foreign language.
| A．benefit | B．used | C．beneficial | D．Habit |
32. John was made____ the truck for a week as a punishment.
| A．to wash | B．washing | C．wash | D．to be washing |
31. Last week, only two people came to look at the house, ____ wanted to buy it.
| A．none of them | B．both of them | C．none of whom | D．neither of whom |
30. She urges me ____ steps in the matter.
| A．take | B．taking | C．took | D．to take |