.The possible benefits of cloning are numerous , for______ producing human tissues and organs for transplant, and for preserving endangered animal species to name but two.
| A．artificially | B．materially | C．scientifically | D．medically |
.
I have just come in to see if I can be _________ any assistance to them.
| A．with | B．on | C．at | D．of |
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If this computer does not give complete satisfaction, please return it to the maker stating when and where it was ________.
| A．designed | B．operated | C．purchased | D．made |
.
I soon found that the work I was doing had already been done by someone else - ________, I was wasting my time.
| A．in a word | B．in all | C．in other words | D．in words |
.
Your watch is slow. You’d better ________ it.
| A．abandon | B．arrange | C．adjust | D．adapt |
.
There was ________ general expectation that ________ most students would pass the exam.
| A．a; ∕ | B．a; the | C．∕; ∕ | D．∕; the |