新题赏析
题一:
the newcomer went to the library the other day and searched for____ he could find about mark twain.
a. wherever b. however c. whatever d. whichever
题二:
scientists study ______human brains work to make computers.
a. when b. how c. that d. whether
题三:
it suddenly occurred to him ______ he had left his keys in the office.
a. whether b. where c. which d. that
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