A：岸边景物在水中出现倒影
B：大厦的玻璃外墙造成光污染
C：阳光下鸽子在沙滩上的影子
D：玻璃砖后的铅笔杆错位
—Do you have enough nurses to take care of the injured?
—No, I think we need _______ nurses.
我国的政府是人民意旨的执行者和人民利益的捍卫者，这是由（ ）
It is difficult ____ (arrive) for class. It is raining.
