—The train is due to leave at 7：50.
—________ we fail to arrive there in time?
—I'm afraid you'd better go in a hurry.
A．What ifB．As if
C．Even ifD．Only if
A
A　[考查省略。what if 要是……該怎么辦？as if 好像；even if即使；only if 只有在……條件下。第二句可還原為“What shall we do if we fail to arrive there in time？”。]
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