Ⅱ.根据句子意思和所给的英语解释，选用方框中合适的单词填空
award；helper；message；invent；select；unknown； return；absent；service； scientist
【小题1】Do you know how many children were __________(not present) this morning?
【小题2】He dreams he is able to __________ (make or design sth for the first time)a robot that needs no energy.
【小题3】I find it difficult to __________ (choose the best or most suitable)a man to be their leader.
【小题4】Why the man has been arrested is __________ (not known) to us.
【小题5】He is asked to __________ (get back) home before it gets dark every day.
【小题6】Have you received his __________ (a piece of information that one sends another) these days?
【小题7】He is certainly able to win the first __________ (sth of value given to sb who is successful) in the competition.
【小题8】We shall remember Premier Zhou for his __________(work or duty done for someone) for ever.
【小题9】Marie Curie was a great __________ (a person who is good at science).
【小题10】The mission is beyond my ability. I need a __________(sb who can help).