617.It is said that the price of that beach house,which you were looking forward to buying,has fallen _______ a further 200 dollars a square meter.

A.at

B.by

C.with

D.for

618.Although the car is _______,you need to drive it in a proper and careful way.

A.in good condition

B.in good use

C.in great need

D.in peace

617.答案是B;

表示增减幅度。

618.答案是A;

in good condition 处于良好状态；in great need 非常需要。