You can borrow my car        you promise not to drive too fast.
A．unless B．even ifC．in caseD．a(chǎn)s lone as
D
句意為：只要你答應(yīng)不開得太快，你就可以借用我的轎車。B,D選項(xiàng)不符合邏輯；unless 常與not等否定意義詞連用。
【考點(diǎn)定位】考查主從句的邏輯關(guān)系。unless 除非（主句常有否定詞not等）even if 即使（引導(dǎo)讓步狀語從句） in case 萬一 as long as 只要（引導(dǎo)條件狀語從句）
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