2011年高三英语一轮复习必修4：unit5课时活页训练(共8页).doc

精选优质文档-倾情为你奉上.单项填空1There are 40 students in our class，who come from a _of backgrounds.Avariety BmixtureCextension Dcombination解析：选A。variety意为“多样性，种类”，表示“他们来自不同的背景”。mixture“混合物，混合体”；extension“伸长，伸展，延伸，范围”；combination“结合，合并，配合，组合”。2John worked hard at his lessons and gained_to a famous university last year.Apermission BadmissionCagreement Dfreedom解析：选B。admission意为“准许进入”，admissio