With the development of modern industry, there will be ___ living space for wild animals.
A：fewer and fewer
B：less and less
C：more and more
D：bigger and bigger
连续阴雨时，生活在土壤中的蚯蚓会爬出洞穴，此现象与生物哪一因素有关？（ ）
More historical buildings in the old town will fall down________we try our best to protect them.
①加热前试管外壁的水没有擦干 ②加热时试管的底部触及灯芯
③被加热液体的体积超过试管容积的 13 ④加热时不停地来回移动试管
⑤没有进行预热，直接集中加热试管底部液体．
