If efficacious new medicines have side effects that are commonly observed and (i

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问题 If efficacious new medicines have side effects that are commonly observed and (i)________, such medicines are too often considered (ii)_______, even when laboratory tests suggest caution.

选项 A、unremarkable…safe
B、unpredictable…reliable
C、frequent…outdated
D、salutary…experimental
E、complicated…useful

答案 A

解析空格(i)：
- 方程等号：and连接平行结构，同义重复。
- 强词和对应：and前面的内容提到新药的副作用是常见的，空格(i)和commonly observed根据and取同，体现“常见的”的特点。unremarkable寻常的，unpredictable无法预测的，frequent时常发生的，salutary有益的，complicated复杂的。选项A和C合适。
空格(ii)：
- 方程等号：even即使，反义重复。
- 强词和对应：根据题意，实验室的测试对药的副作用是警惕的(caution)，因此空格(ii)和caution根据even取反，选择表示“无须慎重对待的”词。safe安全的(对)，reliable可靠的(对)，outdated过时的(错)，experimental实验性的(错)，useful有用的(对)。综合空格(i)，答案选A。

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