题目内容：

用下列几个词组造句..
be busy doing sth.
end up
come up with
concentrate on
take sb.into doing sth.
draw up
even if
别造太难理解的,

优质解答

He is busy doing his homeworkIf you go on like this you will end up in prison.We came up with a group of tourists.我们赶上了一群旅游者.I must concentrate on my work now.我现在必须集中精力工作We took t...