Despite their______ of interest，F(xiàn)leming kept trying to develop the chemical ______ it would be safe and effective.
A．lacking；in order toB．lack；so thatC．lack；so as toD．lacking；so that
B
【點(diǎn)值】1
由第一個空格前的their可知，要填名詞，所以用lack；第二個空要填連詞，才能引導(dǎo)句子。故只有B項(xiàng)符合題意。
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