----- What is the price of petrol these days？
-----Oh, it ______ sharply since last month.
A．is raisedB．has risenC．has arisenD．is increased
B
考查時(shí)態(tài)。Since引導(dǎo)的時(shí)間狀語(yǔ)通常和現(xiàn)在完成時(shí)連用的。句意：自從上個(gè)月，汽油價(jià)格一直在上漲。
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