3.The managers discussed the plan thai they would like to se

3.The managers discussed the plan thai they would like to see __C__ the next year.
A.carry out B.carrying out C.carried out D.to carry out(see后面不是跟do或doing的嘛?选C是什么成分啊?)
4.A:__A__ he come in?
B:Come in please.
A.Shall B.Will C.Must D.Dare （shall不是之用于第一,二人称的吗?为什么不选B呢?）
THANK YOU VERY MUCN!