The correct option to fill in the gap in the sentence “Bimbo sings beautifully … ?” is B. doesn’t she. So, the completed sentence is: “Bimbo sings beautifully, doesn’t she?”

Here’s why:

• A. isn’t it: This option is incorrect because “isn’t it” is used for statements that are in the present tense, not for actions like singing.

• B. doesn’t she: This is the correct option. “Doesn’t she” is used to form a question tag for a positive statement. In this context, it means that the speaker is asking for confirmation that Bimbo sings beautifully.

• C. isn’t she: This option is incorrect because “isn’t she” is used for statements that describe a state of being, not actions like singing.

• D. does she: This option is incorrect because “does she” would be used to form a question, not a question tag.

• E. is she: This option is incorrect because “is she” would be used to form a question about a state of being, not an action like singing.