Question

As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.

A．it

B．what

C．which

D．that

Answer 1

B

試題分析：句意：由于在物理學(xué)和化學(xué)上已知的知識的原因，科學(xué)家們已經(jīng)能夠在生物學(xué)和醫(yī)藥上取得重要發(fā)現(xiàn)。what 引導(dǎo)賓語從句，在從句中做主語。在賓語從句中，which 是哪一個，that不做成分。故選B。
考點: 考查從句關(guān)系詞的用法。