1)Itwaslastnight___Iseethecomet.
A.thetimeB.whenC.thatD.which
答案C.强调句的结构是:It+be+强调部分+that(who)+主谓句.强调句的连词只有两个,that和who.当强调的部分是人,且为句子的主语时,才用"who",其余用that.
原句:Myfatherdidtheexperimentinthelabyesterdayevening.
强调主语:Itwasmyfatherwhodidtheexperimentinthelabyesterdayevening.
强调宾语:Itwastheexperimentthatmyfatherdidinthelabyesterdayevening.
强调时间:Itwasyesterdayeveningthatmyfatherdidtheexperimentinthelab.(注意不用when)
强调地点:Itwasinthelabthatmyfatherdidtheexperimentyesterdayevening.
2)Itistenyears___MissGreenreturnedtoCanada.
A.thatB.whenC.sinceD.as
答案C.考点是连词用法.本题易误选为A.that.其实本句不是强调句.若是,去掉Itbe…that还应是一个完整的句子.而本句去掉'Itis…that',只剩下tenyearsMissGreenreturnedtoCanada.不成句.因此本句不是强调句.
Itis/was+时间+since…其中ishasbeenwashadbeen.