Question

At the top of the high mountains, there is very _____ oxygen in the air.

A．a little

B．little

C．a few

D．few

Answer 1

B

試題分析：句意：在高山頂上，空氣中有少量的氧。few, a few是可數的, little, a little是不可數的。
few 和little表示很少，否定的意思。a few 和a little表示一些，肯定的意思。因為氧氣是不可數名詞，排除C、D；根據句意故選擇B。