either
if
neither
whether
第1题:
Then did I know
Only then I knew
Only then did I know
Only then knew I
第2题:
resistance
contradiction
assistance
evolution
第3题:
stays the same throughout the year
varies from day to day
changes with the season
changes from year to year
第4题:
instructions
directions
notices
advertisements
第5题:
had known
would know
should know
knew
第6题:
visiting his daughter
to visit his daughter
visit his daughter
visited his daughter
第7题:
第8题:
designed
required
refused
reported
第9题:
looked for
robbed
searched
tested
第10题:
embraced
comprehended
introduced
deduced