At first my new surroundings were_____________________（难以忍受）

1. 过去分词短语在句子中做状语

______________________（由于缺乏新鲜空气）,my head ached.

2. make+宾语+宾语补足语

"Put on this mask", he advised. "It will_________________（使你感觉好些）.

3. What引导的名词性从句

However, I lost sight of WP when we reached_______________________（一个看上去像是大市场的地方）because of too many carriages flying by in all directions.

4. 形容词做状语

________________（我感到累极了）, I slid into bed and fell fast asleep.

5. where引导定语从句，修饰先行词system

Well, now there is a system____________________（能处理掉废弃物）using the principles of ecology.