499.We'd better discuss everything ____ before we work out the plan.

A.in detail

B.in general

C.on purpose

D.on time

500.This shop will be closed for repairs ______ further notice.

A.with

B.until

C.for

D.at

499.答案是A;

考查介词短语在具体语境中的作用。句意:我们最好先详细地讨论好一切，然后再制定计划。In detail 详细地；in general 一般而言，总的来说,大体上；on purpose 故意地;on time 准时。根据句意选A。

500.答案是B;

until further notice为习惯搭配，意为:直到另行通知。