answer to sth造句
answer to是什么意思
manage to do sth是什么意思
the answer to the question还是of
ask sb. to do sth.什么意思
answer to the peaks
offer sb sth和offer sth to sb
leave sb. to do sth.什么意思
help sb to do sth造句
ought to do sth 的否定
be ready to do sth