Her little son fell off the boat into the water due to her carelessness. The mother couldn’t help _____because she couldn’t help _____ her son out of the danger.
第二节语法和词汇知识(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
With the price of ______ petrol rising, the bicycle may become ______ popular means of transportation again.
A. the; a B. the; the C. /; a D. /; the