Compared with the developed countries, some African countries are left far behind in terms of people's living standard.

B)相比较发展过的国家，一些非洲国家的人民生活水平远远落后。

C)与发达国家相比，在人民生活水平方面一些国家很落后。

D)就人民生活水平而言，一些非洲国家被落在了发达国家后面。

As requested, we enclose for your attention our price list and catalogue. I would like to take this opportunity of drawing your attention to the fact that all our products are made from completely natural ingredients. There are 200 different items in the catalogue and our prices are reasonable and our quality is good. We look forward to receiving your order soon.

This famous poem should ___ (translate) into Chinese because it is really worth reading.

For what do people say “thank you”？

They say “thank you” for big favors as well as for ______.

What will you say when your adviser helps you to edit your paper？

“Thank you for your help” or “I really ______”

After this agreement is signed by the two parties, both parties shall strictly abide by it.

B)在两党达成协议后，各党派将严格遵守它。

c)在双方达成协议后，各方应严格遵守。

D)在两党签约后，各党派都应严格遵守本协议。