请教几道jj,快考了，help

一种野生小麦最早是在一个STRIP发现的，如何如何，推论这种小麦也应该是在这个STRIP最早种植的，问假设。我选了这个STRIP的REGION在小麦种植前的气候没有什么变化。
如何解释？

关与探测地震,科学家希望通过测海底来与测地震,ask which choice will support to p
ass this plan.
A predict could help people move to a safe place.
B scienst have sth could got enouht info to predict it will happen
是b吗？

通常在餐馆，付现金的客人比用信用卡的客人给的小费要多。科学家却认为，因为使用信用卡可使人意识到自己拥有超过自己实际拥有现金的购买力，因而使用信用卡可以使顾客更愿意花更多的钱。问支持科学家论点的证据？有两个混淆选项：A，上述调查中，所有用现金支付的客人都没有信用卡。B，实验表明，在某餐馆，顾客仅仅因为看到帐单上显示了某一信用卡公司的标志，就更愿意用该信用卡付帐。
选什么？
.
两个地方都装了什么东东来监督车辆违章，但一个地方的效果要比另一个地方效果好。问ASSUMPTION，选A地的维修费不比B的贵。
车辆违规和维修费有什么关系？

According to the dating guidelines for dating proposed by the new head of a certain religious sect , the following criteria must be met before any dating can take place.
When the parents of one young person have agreed with the parents of another young person that the two young people may date, each of the young people must consent, and before so doing must have the other consent.
Which of following assessments of the logic of the proposed dating guidelines is accurate?
The answer is: the guidelines would make it impossible for any young person in the sect date.
请问这句什么意思：and before so doing must have the other consent.
这题怎么理解？