求解一道GWD题

sierrapan

Not one of the potential investors is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were not to be concluded.  
 is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were  
 
 is expected to make an offer for buying First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal was  
为什么deal后面要用were

Which of the following most logically completes the argument?
Yorco and Zortech are two corporations that employ large numbers of full-time workers who are paid by the hour.  ublicly available records indicate that Yorco employs roughly the same number of such hourly wage workers as Zortech does but spends a far higher total sum per year on wages for such workers.  Therefore, hourly wages must be higher, on average, at Yorco than at Zortech, since _____. [table=undefined][tr][td][td][/td][tr][td] [/td][td]Zortech spends a higher total sum per year than Yorco does to provide its hourly wage workers with benefits other than wages [/td][/tr][tr][td][td][/td][tr][td] [/td][td]the work performed by hourly wage workers at Zortech does not require a significantly higher level of skill than the work performed by hourly wage workers at Yorco does [/td][/tr][tr][td][td][/td][tr][td] [/td][td]the proportion of all company employees who are hourly wage workers is significantly greater at Yorco than it is at Zortech [/td][/tr][tr][td][td][/td][tr][td] [/td][td]overtime work, which is paid at a substantially higher rate than work done during the regular work week, is rare at both Yorco and Zortech [/td][/tr][tr][td][td][/td][tr][td] [/td][td]the highest hourly wages paid at Yorco are higher than the highest hourly wages paid at Zortech [/td][/tr][/td][/tr][/td]为什么选D[/tr]

aeoluseros

虚拟语气.

sierrapan

怎么看出来是虚拟语气呢？？

aeoluseros

哈哈，下面还贴了一个argu.
umm..这个还是要把句子看懂.
如果一下子没看懂的话，看到这样子的形式(if从句里面)，就要想可能是虚拟语气，不能马上排除用were的选项