1 . As we__________(accumulate) more devices, however, we didn't throw out our old ones. (所给词的适当形式填空)

2 . As people________（积累更多财富）, they tend to spend a greater proportion of their incomes. (根据汉语提示完成句子)

3 . Knowledge ______ (accumulate) little by little.

4 . Teaching year after year，he gradually ________much experience.

A．calculated	B．accumulated
C．abandoned	D．appointed

5 . Before the opening ceremony of the supermarket, some workers are sent to _____ leaflets on the road.

A．abandon	B．accumulate
C．drop	D．distribute