Which word is the subject of the sentence? did billy hear the announcement on the radio? a. radio b. announcement c. billy d. did

I think the answer would be B.announcement, since in the sentence they're asking billy if he did hear the announcement on the radio.

1. it me on problems i dont know.

2. i can others, which gives me extra practice

3. i learn new things.

4. it fun and easy to use which relives stress.

5.i can prepare myself for tests and quizzes

hope this buddy!

plz mark brainliest

- courtney