The pipes have oil or water, which is heated and sent to the storage tank until to produce electricity.
| A．needed | B．needing |
| C．to need | D．having needed |
____new wave of Chinese migration is under way, fuelled by ever-younger students for whom
English is not a piece of knowledge but a living language to unlock ____ door of the wider world.
| A．The; the | B．The; a | C．A; the | D．A; a |
–Hello, I’m calling to complain about one of your sales staff.
–Oh dear, _____
| A．why not? | B．what happened? | C．how funny! | D．what a shock! |
-- Sorry, it's already 6 o’clock. I have to be off for an appointment.
--- OK. ________.
| A．It couldn’t be better | B．You really have me there |
| C．Let’s call it a day | D．Take your time |
--Why do you choose to work in an international travel agency?
---Well, you know, English is my ________. So it is my best choice.
| A．strength | B．talent | C．ability | D．skill |
As time went by, the plan stuck ________ fairly practical.
| A．to prove | B．to proved | C．to proving | D．to proves |