______adequate precautions are taken, there is no risk involved in the operation.
A．Although
B．Providing
C．Nevertheless
D．Even

未分类题He wont go back to Hong Kong next month. If he______to go back to Hong Kong, he______courses at Cornell Universitys Hotel School.A．were, could not takeB．were, could have not takenC．had been, could not takeD．had been, could have not taken

未分类题In a different political situation, workers______the right to go on strike.A．have not gottenB．have gottenC．might not have gottenD．might have gotten

未分类题It was the drug, not the disease, that killed him. He______alive today if he ______that drug.A．would still be, didn't takeB．would still have been, had not takenC．would still be, had not takenD．will still be, doesn't take

未分类题The products of the chemical industry make a major contribution to present-day standards of living, and life today______impossible without these products.A．isB．has beenC．would beD．would have been

未分类题If John were to resign and if Henry were elected to take his place, we______ more vigorous leadership.A．have hadB．should have hadC．should haveD．had