根据句意，用所给词的适当形式填空： （共10小题，每小题1分，计10分）

小题1:Mary passed her exam because she studied very ___________(hard).

小题2:That’s the ________(enter) to the hall. Please come this way.

小题3:Look! How ________(happy) Kate looks after hearing the bad news! 

小题4:The man in his           (forty) is the person who saved that boy.

小题5:I can’t __________(simple) understand what you said.

小题6:We Chinese people devote much time to __________(help) rebuild Yushu.

小题7:Jim __________( not be) late in the past.

小题8:He’s _________(ever) been to Beijing before, has he?

小题9:All the children should____________(treat) well after the earthquake.

小题10:---What do you think of my advice? ---Sorry. I _______(think) of something else.

古代人崇拜自然，渴望改造和征服世界的能力提高；近代以来随着人类改造自然的不断增强，人类对地球家园造成的破坏性影响也越来越严重，饱尝了高增长带来的苦果。生态文明是在对工业文明带的严重生态安全进行深刻反思的基础上逐步形成和正在积极推动的一种文明形态。上述材料告诉我们（）

①观念源于人们对客观存在的思考

②人们在改造客观世界的同时也改造自己的主观世界

③真理超出实用的条件和范围会变为谬误

④人们对客观事物的认识总是受到主观条件的限制

A.①②

B.②③

C.①④

D.②④