第1题:
changeable
expensive
reasonable
fixed
第2题:
第3题:
第4题:
unless
while
before
once
第5题:
第6题:
to
of
with
on
第7题:
第8题:
Because he’ll write a report.
Because he’ll be with his friends.
Because he doesn’t like the game.
Because he doesn’t know the players.
第9题:
第10题:
Heard
Having heard
Hear
To hear