专四
单选题___ you __ further problems with your printer, contact your dealer for advice.
参考答案：C进入在线模考
【译文】要是你的打印机还有其他问题，请和经销商联系以获得帮助。
虚拟语气。本句表示对现在和将来情况的虚拟：Should you have further problems其实是从If you should have further problems转化而来的，通常这类从句后面，主旬的谓语用祈使语气或陈述语气，如：Should you require anything，just give me a ring．(你要是需要什么就给我打电话。)Should I be free tomorrow，1 will come to see you．(如果明天我有空，我会来看你。)由于本题的主句正是祈使句，从句显然应该由should引导。故C是正确答案。若答案为A，则主句谓语要用虚拟语气would+动词原形，而不用祈使语气。D．In case“万一，以免．以防”，后面一般跟现在时或者should+动词原形，如：I always take an umbrella in case it rains．(我总是带上一把伞，以防下雨。)1 wrote down her address in case I should forget it．(我记下了她的地址，免得忘了。)
虚拟语气。本句表示对现在和将来情况的虚拟：Should you have further problems其实是从If you should have further problems转化而来的，通常这类从句后面，主旬的谓语用祈使语气或陈述语气，如：Should you require anything，just give me a ring．(你要是需要什么就给我打电话。)Should I be free tomorrow，1 will come to see you．(如果明天我有空，我会来看你。)由于本题的主句正是祈使句，从句显然应该由should引导。故C是正确答案。若答案为A，则主句谓语要用虚拟语气would+动词原形，而不用祈使语气。D．In case“万一，以免．以防”，后面一般跟现在时或者should+动词原形，如：I always take an umbrella in case it rains．(我总是带上一把伞，以防下雨。)1 wrote down her address in case I should forget it．(我记下了她的地址，免得忘了。)
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