Most parents encourage their children to take an active part in social events, _____ those events do notinterfere with their studies[ ]

Many experts seem to agree that certainlimit should be set on consumptionof cars to ease air pollution.

It was _________ of the parents who hold the view that boys are superior to girls to treat their own little girl as a stranger.

下列句子，没有语病的一句是（ ）

esterday, but he could not help us