Sometimes Daniel walks for half ________ hour to the zoo.
| A．a | B．an | C．the | D．/ |
【2012贵州贵阳】Teresa is ________ nervous ________ she can’t talk in front of the class.
A. such, that B. too, to C. so, that
【2012天津】A snake bit him ___________ he went to see a doctor at once.
| A．if | B．where | C．because | D．so |
【2012山东青岛】_______ Rita _______ her mother know my address. They often drop by my home.
| A．Not, but | B．Both, and |
| C．Either, or | D．Not only, but also |
【2012山东青岛】_______ we don't support our zoos, it will be difficult for them to take good care of animals.
| A．Unless | B．If | C．What if | D．Though |
【2012山东德州】I enjoy fresh air so I always sleep with the window open _____ it is really cold.
| A．unless | B．when | C．if | D．since |