Question

In which of the following sentences the verb “develop' has been incorrectly used?

• A. A new drug has been developed to combat asthma in small children
• B. A new drug is being developed to combat asthma in small children
• C. A new drug was developed to combat asthma in small children.
• D. A new drug have developed to combat asthma in small children.

Answer 1

Answer:

D. A new drug have developed to combat asthma in small children.