完成下面的几道英语题
（单选）1.why not _______us?because I have a lot of work ________.
A.to meet;to do B.play;to make Csee;doing D.play with;to do
（同义句转换）2.to learn a foreign language is not easy
______not easy __________a foreign language.
（改错）3.what's the creative gift you have ever received?a bike
（改错）4.how do you think of these gifts?