Helen finds ______ difficult to climb to the top of the mountain in an hour.
A. that B. this C.it
To improve his English，he spends _______one hour a day listening to English programmes.
| A．at last | B．at least | C．at once | D．at all |
The art exhibition is really worth _______，and you’re sure to learn lot from it.
| A．visit | B．to visit | C．visited | D．visiting |
For everyone’s safety，we _______ a1ways remember the law against driving after drinking.
| A．could | B．should | C．might | D．would |
Linda, with her parents，_______ the Wolf Hill, and they will be back this afternoon.
| A．has gone to | B．have gone to | C．has been to | D．have been to |
Wearing white can help people _______when they feel stressed.
| A．fall down | B．calm down | C．look down | D．come down |