一个改错题

futuremba

这道题实在让我头痛，请教各位。

Due to the meat boycott, the butchers are doing about half of the business that they did

previous to the boycott.

Taurus

previous to=before..  

看不出来哪个地方有问题..  汗..

Gelidjelly

以下是引用futuremba在2004-7-7 23:30:00的发言：

这道题实在让我头痛，请教各位。

Due to the meat boycott, the butchers are doing about half of the business that they did

previous to the boycott.

C.

half of --> half

doing about half the business惯用

marshial

以下是引用Gelidjelly在2004-7-8 8:14:00的发言：

C.

half of --> half

doing about half the business惯用

普遍现象呢还是个别现象（仅doing about halr the business).

以下是9408-29

The Pacific Ocean constitutes about half of the Earth's water surface and cover about one-third of the total area of the globe.

Gelidjelly

以下是引用marshial在2004-7-8 14:34:00的发言：

普遍现象呢还是个别现象（仅doing about halr the business).

以下是9408-29

The Pacific Ocean constitutes about half of the Earth's water surface and cover about one-third of the total area of the globe.

c.

do动词引出的，不是说about half + n是管用表达