这三个句子都是问句,而做题时都要把它们转换成陈述句来做

　　1.Isthisthefactory_____a_____youvisitedtheotherday?变为

　　thiisthefactory(which/that)youvisitedtheotherday.很明显定语从句中缺宾语,visit是及物动词要带宾语的,所以用WHICH/THAT都可以代替factory.

　　3.Isthisfactory____d______someforeignfriendsvisitedlastFriday?变为陈述句为thisfactoryis(theone)someforeignfriendsvisitedlastfriday.这句中THEONE是先行词,在主句中做表语,4个选择项中只有THEONE既可以做从句的宾语又可以做主句的表语,这是个同位语从句.

　　4.Isthisthefactory____b______heworkedtenyearsago?变为陈述句为thisisthefactory(where)heworkedtenyearsago从句中WORK是不及物动词,成分不缺