Of all the things I have done in my professional career, nothing has been more ______ than writing that book.
| A．approved | B．rewarding | C．developed | D．convincing |
相关试题
.______ the beginning of the 19th century did scientists know that all matter is made up of 
atoms.
| A．At | B．By | C．Up to | D．Not until |
Many people believe that _______ will takes years to develop a car that does not pollute the air.
| A．it | B．that | C．there | D．this |
They have been woking on this project for one month. It seems they need ________ month to finish it.
| A．more | B．other | C．another | D．the other |
________your generous help, we could not be living a happy life today.
| A．Despite | B．But for | C．Because of | D．As long as |
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