Ⅰ词汇
A. 根据句意及首字母提示或首字母补全下列单词，使句子完整正确。
1. It’s our duty to take action to protect the e___________.
2. Mr. Back is _________(致力于) himself to working for UNICEF.
4. Please read a________ (loud) so that everyone can hear you clearly.
5. The ___________ (工业) is developing very fast in my hometown.
