48. According to some analysts, whatever its merits, the proposal to tax away all capital gains on short-term investments would, if enacted, have a disastrous effect on Wall Street trading and employment.
whatever its mertis 和 if enacted都是插入语,一般先去掉再做题。如果选DE的话,taxing。。。和to。。。都不能跟Have(谓语)连接。所以选A。 According to some analysts, whatever its merits, the proposal to tax away all capital gains on short-term investments would, if enacted, have a disastrous effect on Wall Street trading and employment.