Since
While
Although
Unless
第1题:
have arrived
are arriving
had arrived
has arrived
第2题:
embraced
comprehended
introduced
deduced
第3题:
which
that
in which
why
第4题:
hasn’t he
isn’t it
isn’t he
hasn’t
第5题:
interested
troubled
annoyed
anxious
第6题:
can
can’t
do
don’t
第7题:
common
uncommon
interesting
uninteresting
第8题:
for
moreover
consequently
whereas
第9题:
breaks
has broken
were broken
had been broken
第10题:
mustn’t
can’t
shouldn’t
may not