---Do you think we can get there on time?---Yes, ________ the car doesn't break down.A.if onlyB.even ifC.in caseD.so long as
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D解析句意：--你认为我们能按时到达吗？--能，只要汽车不出故障。as/so long as引导条件状语从句。as/so long as相当于only if，意思是“只要”，强调条件的唯一性。A项if only意思是“但愿，要是……就好了”，应与虚拟语气连用。如：If only I were rich.但愿我很富有。If only I had gone by taxi.我要是乘出租车去就好了。