For further details about our newly developed products ________ our company's website.
| A．visiting | B．visit |
| C．to visit | D．visited |
Last year many well-known singers did everything _______ help the people in the tsunami-hit countries.
| A．she could do | B．she could to | C．that she could do | D．that she could |
John decided that he had to do something to _______ his anger .
| A．let off | B．give off | C．give out | D．send out |
If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
| A．problems | B．difficulties | C．questions | D．chances |
— Where is my English book?
— I brought it to you _____you were in hospital yesterday afternoon.
| A．since | B．if | C．once | D．while |
The nutrients in _____falls into the ocean quickly become available to other living creatures.
| A．whatever | B．whichever | C．that | D．wherever |