D最重要的错误 D否认了不装radio的人收到所有program的可能性【 could not receive any programming from the RDS radio station】,而本题谈论的能否收到的范围仅限于special program【 (RDS) technology broadcast special program information that only radios with an RDS feature can receive】
There are two independent variables—availability of alternatives and ease of changing suppliers—that companies should use to evaluate the feasibility of subjecting suppliers of indirect purchases to competitive scrutiny. This can create four possible situations.这句话是承上启下的。说明的一个strategy(有两个可变因素alternatives,changing),接下里下一段分别解释了四种可能的情况。所以选C
根本就不能从begin to do 和doing来做这道题。。看看官方吧。 OG12-121解释: B.Particularly red wine cannot describe consumption—the preposition of is needed; the placement of they so far from the position of the antecedent Sales makes the sentence awkward and difficult to decode.
D最重要的错误 D否认了不装radio的人收到所有program的可能性【 could not receive any programming from the RDS radio station】,而本题谈论的能否收到的范围仅限于special program【 (RDS) technology broadcast special program information that only radios with an RDS feature can receive】