1. lack v/n
(a/the/one’s) lack of sth ____________
lack sth ______________
be lacking in sth ____________________
由于缺乏经验，他的第一次投资很失败！
His____________________ resulted in his failure in the first investment.
He ___________________, so he failed in his first investment.
He ____________________, so he failed in his first investment.
________(lack) in experience, he failed in his first investment.
