.________ gas leaks and similar accidents should occur, some responsible persons should regularly inspect all the laboratories.
| A．Unless | B．In case | C．Provided | D．Until |
I'd like to take _____ of this opportunity to thank you all for your cooperation.
| A．profit | B．benefit | C．advantage | D．interests |
I broke my relationship with John because he always found _____ with me.
| A．error | B．mistake | C．fault | D．failure |
In my opinion, your work does not _____ what I expected of you.
| A．catch up with | B．add up to | C．come up to | D．go in for |
He looked incredulous(不轻信的) on hearing the news. He seemed to think it _____.
A. incompatible B.incredible C.inclusive D indifferent
How did it _____ that the two men arrived to address the same meeting at the same time.
| A．fall out | B．take place | C．get around | D．come through |