菜鸟问OG的几道题

234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.

(A)  infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye

(B)   however, the wavelength of infrared radia­tion--0.1 millimeters--is top long to be registered by the eye making it invisible

(C)  infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it

(D)  however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible

(E)   however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible

Choice A, the best answer, is clear, idiomatic, and grammati­cally correct. In B, the misplaced participial phrase making it invisible modifies eye rather than wavelength, thus producing a confusing statement that distorts the meaning. In C, D, and E the use of the second it is so imprecise as to be confusing. Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation. Choice E produces an illogical statement by using a restrictive clause introduced by that where a comma followed by the nonrestrictive "which" is required: a wavelength of 0.1 millimeters that is too long nonsensically suggests that not all wavelengths of 0.1 milli­meters are too long for the eye to register.

荧光笔部分看不大懂！

222. By a vote of 9 to 0, the Supreme Court awarded the Central Intelligence Agency broad discretionary powers enabling it to withhold from the public the identities of its sources of intelligence information.

(A)  enabling it to withhold from the public

(B)  for it to withhold from the public

(C)  for withholding disclosure to the public of

(D)  that enable them to withhold from public disclosure

(E)   that they can withhold public disclosure of

B为什么不对？