【推荐1】I think the light bulb is one of the most important ________ (发明).

【推荐2】Washing machines were a wonderful ________ (invent) at that time.

【推荐3】The computer is one of the greatest___________ in the twentieth century. (invent)

【推荐1】There is no d________ (疑问) that he will work out all the difficult problems.

【推荐2】I am a ________ (成员) of the English Club.

【推荐3】Tell the boy not to sit on the top ______(台阶). It is dangerous.

【推荐1】Nick and I both like collecting s________.

【推荐2】Complete the sentence with a proper word according to the given phonetics（根据所给音标用适当的单词完成句子，每空格限填一词）
1. I prefer to buy that ____________ dress online if you ask for my advice. /'mɒdn/
2. It's ____________ to walk in wet and dirty streets. /'ɔːfl/
3. Perhaps people will be able to live on other _____________ ./'plænɪts/
4. What do you think will ____________ in the future? / 'hæpən/
5. Jim ___________ his glasses and broke them. /drɒpt/

【推荐3】根据句意及汉语提示完成单词
1. What do you want to be in the f________．
2. Would you please give me some p________？I want to write a letter.
3. People will have r________in their homes.They can help do many things.
4. If there are more trees, there will be less____________(污染)．
5. I don't know the books on the table are________(免费的)