17、While many studies claim that vitamins and herbs      improve health, there are a lot of controversy about their safety.

A．can         B．should          C．must          D．shall

17、A

請?jiān)谶@里輸入關(guān)鍵詞：
相關(guān)習(xí)題

科目：高中英語 來源： 題型：

While many studies claim that vitamins and herbs      improve health, there are a lot of controversy about their safety.

A．can         B．should          C．must          D．shall

查看答案和解析>>


同步練習(xí)冊答案