The development of industry has been ____ gradual process throughout ______human existence, from stone tools to modern technology.
| A．/, the | B．the, a | C．a, / | D．a, a |
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12. I'm _______ in studying English words. Don't bother me
| A．absorbing | B．absorbed | C．to absorb | D．being absorbed |
11. --- Don’t you know our boss accepted the suggestion _______ by some workers?
--- Really? That’s great.
| A．put off | B．put together | C．put forward | D．put aside |
10. Though I have stayed _______ for a few years, I have always been concerned about my motherland.
| A．board | B．broad | C．aboard | D．Abroad |
9. An earthquake shook the city last night and hundreds of houses _______.
| A．got to damage | B．got damaged | C．got damage | D．got damaging |
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