(2013·新课标Ⅱ)Only by increasing the number of doctors by 50 percent ________ properly in this hospital.

One of our rules is that every student ______wear school uniform while at school.

It was the drug，not the disease，that killed the boy.——He would be still alive today if he ________ that drug.

Bob has gone to California.—Oh, can you tell me when he ______

get two tickets of Despicable Me Ⅱ, as I have promised .