No one in our class but Tom and I that a new teacher is going to teach us English．
| A．knows | B．know | C．have known | D．am to know |
-----How dangerous it was !
-----Yes, but for the young man’s quick action, herun over by the car.
| A．should have been | B．would be |
| C．could have been | D．might be |
Chemical pollution will bring about a threat to agriculture and food chain, and
to human health.
| A．frequently | B．significantly |
| C．steadily | D．consequently |
By the year of 2053 there will be 487 million aged people in China，means that one third of the population will be over 60.
| A．that | B．which | C．what | D．where |
It is hoped that one day all the wild animals shut up in the cages will be set free to nature and live happily inwild.
| A．/ ; the | B．the; / | C．the; the | D．a; / |
Don’t be discouraged. ____things as they are and you will enjoy every day of your life.
| A．Taking | B．To take | C．Take | D．Taken |