桥涵构造物养护，根据交通发展需要，可通过改造和改建来提高（）和（）。
参考答案：承载能力；通行能力
-________ are you going to be a basketball player?
-I’m going to practice basketball every day.
A．What
B．How
C．When
D．Where
We had ______ fun at Mary’s party last Sunday.
A．a lot of
B．a great many
C．a large number of
D．many a
