①密閉程度較高 ②高大寬敞，通風(fēng)透氣性好 ③墻體較厚 ④許多民居有兩層窗戶

A. ①②③ B. ①②④ C. ①③④ D. ②③④

【題目】假如要給地球縫制一件外衣，那么所需要的布料應(yīng)該是（ ）
A.5.1億平方千米
B.5.1億千米
C.5.1億立方千米
D.5.1平方千米

【題目】The charity began providing _____ food and water for _____ people in the earthquake area.
A.to provide; to
B.providing; for
C.to provide; with
D.providing; with

【題目】Miss Zhang can ______a lot of good ways _____ the problem.
A.come out with, to solve
B.come up with, to solve
C.work out, to solve
D.come up with, to answer

【題目】為了保護(hù)與和平利用地球上最后一片凈土──南極地區(qū)，下面做法，哪一項(xiàng)是正確的（　�。�
A.大建居民點(diǎn)，向南極地區(qū)大量移民
B.大力開(kāi)采南極地區(qū)的礦產(chǎn)資源
C.大規(guī)模捕鯨、企鵝
D.各國(guó)加強(qiáng)合作，履行《南極條約》

【題目】Lucy _____ her kind mother and she often helps _____ sick kids in the hospital.
A.takes after, take care of
B.looks after, takes care of
C.takes care of, take after
D.takes after, looks after