- What’s the low-carbon (低碳) style life like?
- Save _____ energy, produce _____ carbon.
| A．more, more | B．more, less |
| C．less, less | D．less, more |
By the time he ______ at the railway station, the train ______.
| A．had arrived; had left |
| B．arrived; had left |
| C．arrived; left |
| D．arrived; has left |
–We will visit the Summer Palace ______ there is a heavy rain tomorrow.
--OK! Boating on the lake must be great fun.
| A．if | B．as soon as |
| C．unless | D．since |
–How long ______ the restaurant ______? --For eight years.
| A．has; opened | B．has; been opened |
| C．did; open | D．has; been open |
–What should I do ______ healthy, doctor? --You should take more exercise.
| A．keep | B．to keep |
| C．keeping | D．keeps |
–Have all the boys known that they ______ an English test this afternoon?
--Yes. Every boy has been told about it.
| A．had | B．has |
| C．are having | D．will have |