Mr. Smith works as a government official now, but he ______ in a middle school for 5 years.
| A．has worked | B．worked | C．had worked | D．had been working |
相关试题
While s
hopping, people sometimes can't help _______ into buying something they don't really need.
| A．to persuade | B．persuading | C．being persuaded | D．be persuaded |
With no one to ______ in such a frightening situation, she felt very helpless.
| A．turn on | B．turn off | C．turn around | D．turn to |
_______ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
| A．Being separated | B．Having separated |
| C．Having been separated | D．To be separated |
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