急求几道高中英语题目,请大家帮帮忙啦~~~十分感谢
有解释最好啦~~~拜托了!
1.All the tasks( )ahead of time,they decided to go on holiday for a week.
A.had been finished B.were finished
C.having been finishedD.been finished
2.His article ( )enough supporting ideas.
A.is lacking of B.lack
C.lacks ofD.is lack of
3.-My uncle will be here to attend a meeting tomorrow.
-Oh,I thought that he ( )today.
A.was comingB.is coming C.will come D.could come
4.When last ( )valuable,those books enjoyed great success.
A.findingB.foundC.being found D.to be found