The eggs will go bad soon in such hot weather ________ they are put in the fridge.
| A．although | B．because | C．unless | D．until |
A: ________ I go to the airport to see Uncle David off tomorrow morning, mum?
B: No, you needn’t. You may join us if you want to.
| A．Must | B．Need | C．Should | D．May |
The waitress talked as ________ as she could to make the customers understand her.
| A．clearly | B．more clearly | C．most clearly | D．the most clearly |
It is not very easy for the Chinese ________ for a visa(签证) to the USA.
A. apply B. to apply C. applying D. applied
-- How long has Eliza been a nurse?
-- _______
A. Since 2002. B. Four years ago. C. In 2002.