试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(destroy) Those anticancer drugs are effective, but also
to white blood cells.
参考答案
试题解析
此处缺少形容词。
but是并列连词，所以空格处的成分跟effective性质一致，所以应该是形容词形式。因而变destroy为形容词destructive。
句意：这些抗癌药物是有效的，但也会破坏白细胞。