Нelp... Change thefollowing statements to questions supplying short   answers.Example: 

1. Serology is cheaper than the other diagnostic tests. 
 Is serology cheaper than the other diagnostic tests? (Yes, it is/No, it isn't)

2. It requires a short execution time.
Does it require a short execution time? (Yes, it does/No, it doesn't)

3. Human immunodeficiency virus can damage organs
directly.
Can human immunodeficiency virus damage organs directly? (Yes, he can/No, he can't)

4. The survival time and comfort of patients will depend greatly on therapies that prevent individual opportunistic infections.
Will the survival time and comfort of patients depend greatly on therapies that prevent individual opportunistic infections? (Yes, it will/No, it won't)

5. Research into such therapies has expanded markedly in the past 5 to 10 years.
Has research into such therapies expanded markedly in the past 5 to 10 years? (Yes, it has/No, it hasn't)

6. That filter stopped ordinary bacteria. 
Did that filter stop ordinary bacteria? (Yes, it did/No, it didn't)

7. Viruses come in all kinds of shapes.
Do viruses come in all kinds of shapes? (Yes, they do/No, they don't)