The popularity of Western festivals in China may be attributed to several factors. On one hand, with China’s opening up to the outside world, many people, young people in particular, have been exposed to foreign cultures, an important part of which are holidays and festivals. On the other hand, business people take advantage of the occasion of celebrating western festivals to promote sales of their products to make much more money than usual. A case in point is Christmas shopping every year.
There are several factors/reasons for …First of all(For one thing)…Secondly(For another)…Lastly(In addition)
To make good food and water supplies even better, the Government needs to tighten its regulatory standards, stiffen its inspection program and strengthen its enforcement policies. The food industry should modify some long accepted practices or turn to less hazardous alternatives. Perhaps most important, consumers will have to do a better job of learning how to handle and cook food properly. The problems that need to be tackled exist all along the food supply chain, from fields to processing plants to kitchens.
在上面这段关于食品、饮用水安全的文章中，提到了政府、相关产业以及消费者三个方面，而谓语动词分别用了need to do sth.//should do sth.//will have to do a better job of doing sth.可以借鉴，此外还可 It is necessary/imperative/important for sb. to do sth.// It is high time that sb. did 等句型。