The charge from 5 dollars to 50 dollars, depending on the quality.
| A．transforms | B．varies |
| C．trembles | D．evaluates |
---The zookeeper was really annoyed with me.
--- How could he have been if you _______ stones at the animals?
| A．didn’t throw |
| B．don’t throw |
| C．hadn’t thrown |
| D．haven’t thrown |
---Do I have to bring my camera tomorrow afternoon?
---I think so．We _______ the Botanical Garden then.
| A．will be visiting |
| B．are visiting |
| C．have visited |
| D．visit |
We have an adviser on hand in this activity _______ you have any worries or problems.
| A．when | B．now that |
| C．though | D．in case |
The spread of the Ebola virus in Nigeria is believed _______ by August, 2014.
| A．to be controlled |
| B．to have been controlled |
| C．to control |
| D．to have controlled |
My boss is very generous, and he is ______ generous when we get a big order.
| A．very | B．most | C．only | D．rather |