Change the following sentences as directed in the brackets. (a) Pasteur was a famous scientist. (Interrogative) (b) He found cures for several of them. (Negative) (c) At first, he treated only animals. (Passive) (d) He found a mad dog and injected some germs of the diseases into its blood. (Interrogative) (e) May our medical science develop more and more. (Assertive)