无锡市华士片2017年5月中考模拟英语试题及答案
四、词汇运用（本大题共8小题，每小题1分，共8分）
(A) 根据句意和汉语注释，在答题卡对应题号的横线上，写出单词的正确形式。
1. There are always soldiers __________ (守卫) outside the gate of the government buildings.
2. We can __________ (使……满意) our basic wants more easily than in the past.
3. __________ (以，凭借) his efforts, Edison successfully made so many useful inventions.
4. The Chinese government has decided to do further research on that __________ (未知的) areas as soon as possible.