---It is worrying that the children are playing by the river, isn’t it?
---___________
| A．Surely. | B．Absolutely! |
| C．Perhaps. | D．Oh, really? |
I like __________in the early morning when the air is fresh and I can take a walk around the garden.
| A．that | B．it | C．which | D．what |
Beijing was attacked by such a terrible sandstorm __________few citizens has ever experienced before.
| A．where | B．as | C．when | D．which |
It was announced that only when the fire was under control __________to return to their homes.
| A．the residents would be permitted |
| B．had the residents been permitted |
| C．would the residents be permitted |
| D．the residents had been permitted |
—Why didn’t you help him?
—I __________, but I didn’t have the money.
| A．I did have | B．I would have | C．will have | D．must have |
The new tax would force companies to __________energy-saving measures.
A. adapt B. adopt C. adjust D address