问题

My friend has returned from the UKShe ______ at Oxford for four years, during which we communicated with each other on the Internet

A:studied
B:has studied
C:had studied
D:has been studying

正确答案是：

同类题型

Mrs Baker has her hair _____every Fridayafternoon after work.

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________ cleaning the yard and making up the beds for the old, we also read newspapers for them and had chats with them.