____ that silver is not widely used as a conductor?
| A．Why is | B．Is it why | C．Why is it | D．Why is that |
相关试题
At the age of 29, Dave was a worker, in a small apartment near Boston and ______ what to do about his future.
| A．living; wondering | B．lived; wondering | C．lived; wondered | D．living; wondered |
Failure is never a pleasure, but it can have a effect on your life once you learn to use it. 
| A．positive | B．major | C．concrete | D．sure |
As is known to us all, failure usually_____laziness while diligence can______success.
| A．results from; lie in | B．results in; result from | C．leads to; lie in | D．results from; result in |
Animals have died coming into contact with this chemical.
| A．as a consequence of | B．in return for | C．in the name of | D．in spite of |
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