I would have come to see you had it been possible, but I______so busy at that time.
A．had been
B．were
C．was
D．would be

未分类题A couple needing a yard for their children rented the house______in the weekend newspaper.A．being advertisedB．advertisingC．advertisedD．to advertise

未分类题There are two spare rooms in the building, neither of______has been provided with modern facilities.A．whichB．thatC．themD．whom

未分类题The scientists ______ the mystery of the double helix, the scope for genetic engineering dramatically increased.A．having solvedB．after being solvedC．solvingD．solved

未分类题Our difference, ______, is one of method, not one of principle.A．which I seeB．as I see itC．that I seeD．I see

未分类题The students were so fascinated by the______Yangtze River that they spent hours sitting on its bank and gazing at the passing boats and rafts.A．medianB．mightyC．measurableD．maximal