相关试题
He advised farmers to choose the best seed-heads ,__________ that had the best color .
| A．不填 | B．ones | C．this | D．the ones |
Great changes have taken place in that factory. It is no longer ____
_____
it was 20 years ago,_____ it was so poorly equipped.
| A．what ,when | B．that ,which | C．what ,which | D．which ,that |
When first __________to the market ,these products enjoyed great success .
| A．introducing | B．introduced | C．to introduce | D．being introduced |
__ It is so late. Our son __________ be back .
__ Don’t worry . I dare say he ________ have some extra work to do.
| A．can ; must | B．will ; might | C．should ; must | D．must ; may |
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