．Our teacher is very busy.He is ________ in working out a teaching plan.
A．involve B．involving
C．involved D．to involve
Beijing Man used fire for cooking food and also for light, warmth and ________
wild beasts.
A．protected from B．protection from
C．protecting from D．to protect from
The doctor strongly recommended that he ________ a holiday.
A．would take B．took
C．had taken D．take
Mr.Smith, there's a man at the front door who says he has news for you ________
vital importance.
A．of B．with C．in D．from
My sister studied hard at school when she was young, which contributes ________ her success in her career.
A．with B．for C．from D．to
China ________ the agreement and there are now 31 Chinese sites ________ the
World Heritage list.
A．wrote；on B．signed；on
C．agreed；in D．preserved；in
