With more forests being destroyed, huge quantities of good earth ______ each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and
experts can’t be exactly sure about its use.
| A．had been found | B．was found | C．has been found | D．would be found |
Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent
fewer calories than usual increased life span.
| A．for which | B．to which | C．of which | D．in which |
The county, ________ in the north of Shanxi, has a history of more than 1,400 years.
| A．located | B．to be located | C．being located | D．locating |
—Shall we attend the concert this evening?—Great idea, ___ we can do some shopping first.
| A．when | B．where | C．since | D．if |
—Why do English people talk so often about the weather when they start a conversation?
—Well, it’s probably because the weather is a(n)________ topic.
| A．safe | B．sensitive | C．amazing | D．ordinary |