The scientist spent years alone in the forest，_____________ by eating wild fruit and small animals．
| A．surviving | B．survived |
| C．to survive | D．having survived |
After the mew technique was introduced ,the factory produced in 2001 as the year before.
| A．as twice many machines | B．twice many as machines |
| C．as many machines twice | D．twice as many machines |
—Daddy, which of these smart hats do you like best in the hat shop?
—_______. They are both expensive and less warm-keeping.
| A．Either | B．Nothing | C．Neither | D．None |
Remember everybody you meet online is a stranger. So when you can’t see a person, they could be _________.
| A．everybody | B．somebody | C．anybody | D．nobody |
As ____ mountains beyond our village are becoming greener and greener, they have become_________ home to a large amount of wild life.
| A．the; / | B．the; a | C．/; a | D．the; the |
Don’t worry too much about mistakes. They are _ natural part of learning.
| A．不填；a | B．the；a | C．the；不填 | D．the; the |