精选优质文档-倾情为你奉上动词不定式（ ）1. Its our duty _ the room every day. A. to clean B. cleaned C. clean D. cleans（ ）2. Its hard for us _ English well. A. learn B. learns C. to learn D. learning（ ）3.建造这座立交桥将花费工人们一年多的时间。 It will _ the workers over a year _ _ the flyover(立交桥).A. take. for build B. take. to build C. takes. to take D. took .to take（ ）4. Its very nice _ you to get me two tickets _ the World Cup. A. for，of B. of，for C
