单项选择 适中0.65 引用1 组卷47
The side effects (副作用) of the medicine are still ________ to us. More research is needed.
| A．unknown | B．unnecessary | C．unusual | D．uncommon |
21-22九年级下·全国·单元测试
类题推荐
The cause of the driver’s death remains ________. Nobody knows how he died.
| A．uncommon | B．uncomfortable | C．unknown | D．unusual |
The side effects（副作用）that the medicine has are ________ to us.
| A．unknown | B．unnecessary | C．unusual | D．uncommon |
The side effects (副作用) of the medicine are still ________ to us. More research is needed.
| A．unknown | B．unnecessary | C．unusual | D．uncommon |
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