三道高中英语单选.
几道英语单选
1.InChina,students____howtocleanroomsincetheyarelittle.
a.weretaghtb.taughtc.havebeentaught
2.oneactivityofthefestiveistheapplehunt_____studenttrytofindthehiddenapples.
which?where?whose?
3.It'suncertain____thecitywillbecomesafewithbloodingconflicts.
whether?that?what?
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