名词和主谓一致

Question

1.Every possible means ( )to prevent the air pollution,but the sky is still not clear
A.is used B.are used C.has been used D.have been used

2.Either you or the headmaster ( ) the prizes to these gifted students at the meeting
A.is handing out B.are to hand out
C.are handing out D.is to hand out

原因
every和either的谓语单数还是复数？

Answer 1

1。C，句中means是单复数同形，表示“方式、方法”，但前面有个every,侧重指的是“每一种”方法，所以确定谓语要用单数，又根据语意知道每一种方法是已经被用过了，所以要用完成时，答案选C
2。D，句中either...or,遵循就近原则，由headmaster确定后面谓语是要用单数，又be to do sth表示“将要做某事”，而只有go,come等趋向性动词才能用进行时表将来，即be going,be coming,符合题意的就是D