— Your bike is very beautiful. How long ____you _____it? — Just two weeks.
A. have; bought B. did; buy C. have; had
Talk to your teacher and you will get help ________ you have a problem.
| A．unless | B．if |
| C．until | D．so |
We have friends to help us fight against pollution, and trees are one of ________.
| A．themselves | B．they |
| C．their | D．them |
Now, people regard drinking tea ________ a culture more than a habit.
| A．as | B．by | C．of | D．with |
Our mother earth gives us ________ we need in our daily life.
| A．nobody | B．nothing |
| C．everybody | D．everything |
Three bridges ________ over the river five years ago.
| A．built | B．build |
| C．were built | D．are built |