完成句子. 1．The young man ________________________ (控告) robbing an old woman of her necklace  in the street last month. (accuse) 2．The library demanded that all the books ___________________ (返回) before Friday. (return) 3．He got his ________________________ (阐明立场) to encourage more young people to support this solution. (clarify) 4．As soon as she entered her own room, she caught sight of the gift ____________ _________ (由父亲买的). (buy) 5．In front of the house ________________________ (坐着一位男孩), whose father was killed in the war, when we arrived there. (sit) 6．Little ________________________ (人们意识到) how much money it costs to bring up a child. (realise) 7．________________________ (到达) a strange-looking house, he showed me into a large, bright clean room. (arrive) 8．The investigation found ten government officials _______________ (卷入) the case. (involve) 9．She can't ________________________ (忍受居住在) in a noisy environment. (tolerate) 10．_________________ (一旦发生火灾), open this safety door and ring the alarm bell.(case)