Once ____ in the forest, you ought to remain ____ you are waiting for help．
A．losing; whereB．losing; thereC．lost; thereD．lost; where
D
考察固定詞組和狀語從句。Be lost in在…中迷路；第一空我們可以認為是省略句，省略了you are.第二空是一個狀語從句，你應該呆在你等待幫助的地方。
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