_______ for your laziness，you could have finished the assignment by now.
A
句意：要不是你懒惰，到现在你就能完成任务了。本题是一个省略if的虚拟条件句，主句用couldhavedone表示与过去事实相反，条件从句应用haddone形式，had要提前构成倒装。
I don ’ t need any help at the moment,but I _____your offer.
He was ______ to withdraw from running for the presidency.
It is important to ________ your skin from the harmful strong sunlight.
Itisimportantto________yourskinfromtheharmfulstrongsunlight.
Not until recently_____that Thompson had ben telling the truth all along.