careful的副词比较级是什么

　　If you drive carefully you can get better mileage from your car.

　　你只要小心开车，你的车就能多跑很多里程。

　　All our hotels have been carefully selected for the excellent value they provide.

　　我们住的旅馆都是精心挑选的，最为合算。

　　He carefully skirted the issue of where they would live.

　　他小心地避开了他们将住在何处这个问题。

　　She put the glass down carefully.

　　她小心翼翼地放下玻璃杯。

　　The government will have to tread very carefully in handling this issue.

　　政府在处理这个问题时须慎之又慎。