____ the paper,i have to write it carefullya:starting b:after sta_英语解答

____ the paper,i have to write it carefully
a:starting
b:after starting
c:having started
d:once i start

人气：144 ℃　时间：2020-01-28 10:04:34

解答

d: once i startthe paper, i have to write it carefully
一旦我开始写论文,我就必须很谨慎地完成它.