（） must be done to solve this problem.

下面每句都有一個標點符號錯誤，該用標點處未用標點或標點符號用錯，改正錯誤或補寫標點。1.I don't know how to answer that question?2.Don't forget to cross your ts.3.Ouch I think I've broken my toe.4.It was James' father not her mother,who visited her recently.5.It is a dependable fool proof method.6.Our company produces many fine products it has,in fact,a reputation for quality merchandise.7.In the first quarter prices rose 5 per cent;in the second quarter,3 per cent and in the third 7 per-cent.8.Frank Stanley,III will replace his grandfather,Frank Stanley,Sr.,as president of the company.9.Stallions yield the highest prices;but mares can also be extremely expensive.10.Help,Help!Someone has fallen into the river.

We have received with thanks your fax of March 30 and （） to reply as follows.

In addition to setting the price of a product, business firms must decide （） to offer special discount and credit terms to their customers.

用所給的詞和詞組寫出符合邏輯的句子。we/consider/unless/placing an order/will not/you can/give us/of 10%/a price reduction

（） our general agent, you would also have to look after the advertising.

The importer will submit references if these （） given in the preliminary negotiations.

Although （） primarily to promote trade relations, these agreements also foster technological cooperation.

用所給的詞和詞組寫出符合邏輯的句子。inform us/please/at once/so that/of your telex number/we will/reply to/be able to/your query

It might have been （） who made the bid.