问题

Li Ping, your cousin speaks fluent English, like a native speaker.—No wonderHe once _____ in New York for two years as a visiting professor

A:had worked
B:has worked
C:worked
D:has been working

正确答案是：

同类题型

Two explosions near the finish line of the Boston Marathon killed at least 3 people and injured more than 180 others, and currently FBI has figured out how it __________.

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I hope _____ the job she’s applied for (申请)

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