根据句意及汉语提示完成下列句子。
1. Luck 52 the people who want to show themselves (给……提供……) a good stage.
2. (多亏……) the modern communications, we can keep in touch with our friends and relatives far
away easily.
3. China has great (取得进步) in sending man-made satellites into space.
4. Our new headmaster looks very young. I think he is (少于) thirty years old.
5. Mike is weak in English. In order to (赶上) others, Mike works harder than before.