下列句子中，标点符号的使用不正确的一项是(　　)

下列各句中，没有语病的一项是 （ ）

He is happy because I have made_____ mistakes in the test this time than last time.

Over the past decades, the population in this country because of the rising birth rate, immigration and the declining death rate.

When ______CAAC flight 92 _______–Just a minute and I’ll check the timetable.