Though our pilots today will try to approximate the original landing site,they’re___the winds,so who knows where they’ll drift off to
| A．at the mercy of |
| B．at the call of |
| C．at the service of |
| D．at the expense of |
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| A．bought | B． are bought | C．buying | D．to buy |
—I may go to the market this afternoon.
—Could you please buy some fruit for me you are there?
| A．since | B．if | C．while | D．fits |
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| A．called for | B．called on | C．called up | D．called in |
—The place of interest is really beautiful。
—Yes，Mr White a right place.
| A．introduces | B．introduced | C．had introduced | D．was introducing |
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