3．But some idioms are very new and you’ll need to clarify ____________.
但有些习语是很新的，你需要来弄明白它们的意思。
答案：what they mean
4．______________，ladies and gentlemen，I would point out that，although we have made satisfying progress，many still remains to be done.
总之，女士们、先生们，我要指出的是，虽然我们已经取得了令人满意的进步，但还有很多事要做。
答案：In conclusion
