一、用所给单词的适当形式完成下列句子
1．We gave him a ________test paper to do, so it's unbelievable that he has ________it ________ in just half an hour.(complete)
2．What Mr.Zhang ________ was very ________．What's more, his method of ________ was most agreeable.(instruct)
3．The ________ of something is the fact that it is ________ to something else; in other words, we call it an ________ thing.(add)
4．This ________ virus _ _______ children easily and the ________ can be carried in many ways.(infect)
5．________ I drank the medicine, I got an ________effect.(immediate)
6．I have told them with absolute ________ there' ll be no change of policy.(certain)
答案: 1．complete；completed；completely
2．instructed；instructive；instruction
3．addition；added；additional
4．infectious；infects；infection
5．Immediately；immediate
6．certainty
