1,Halfoftheclassgirls.A.isB.arec.wasd,havebeen2,Inthedarkstreet,therwasnotasinglepersonshecouldturnforhelpAthatBwhocfromwhomDtowhom3,Thebirdflyawayyesterday.A,lettoB,islettoC,wasletD,wasletto

Question

1,Half of the class ___girls.
A.is B.are c.was d,have been
2,In the dark street,ther was not a single person ____she could turn for help
A that B who
c from whom D to whom
3,The bird _________fly away yesterday.
A,let to B,is let to
C,was let D,was let to

Answer 1

1 B class是集体名词,指班级成员,这句话的意思是半数的班级成员 是 女孩,谓语动词应该用复数.
2 C 很明显这是一个定语从句,先行词是person后面she could turn for help是用来修饰先行词的定语从句.这句话的意思是在那条漆黑的街道上没有一个人可以帮助她.turn for help to sb 是固定搭配意思是向某人求助
3 C 这是一个被动句,排除A,yesterday说明是过去式,再者let后面不加不定式,所以正确答案是C.