He has been studying in the library every night ______the last three months.A．sinceB．until

（Even though) Sedat （has been studying) English for three years before he came （to the Uni

In the 160 years in which "handedness" has been studied we have learned quite a lot, but w

In the 160 years in which "handedness" has been studied we have learned quite a lot, but w

He told me that he ____ in Naples the previous year.A、has been workingB、has workedC、had

What type of sentence is "Jim has failed in the exam though he has been working hard. "？A．

He has been for five years.A. in prisonB.in the prisonC.on prisonD.at the prison