What is the preposition in this sentence?

The bird flew directly over our heads.
A. flew
B. over <-----
C. heads
D. our

What is the prepositional phrase in the sentence?
My best friend lives down the street.
A. my best friend <----
B. lives down the street
C. down the street
D. my best friend lives

What is the appositive in this sentence?
One of the richest men in the world, Bill Gates, started Microsoft.
A. richest men
B. richest men in the world <----
C. Bill Gates
D. started Microsoft

What is the appositive in this sentence?
The potato, a type of root vegetable, is high in starch.
A. the potato
B. the potato, a type of root
C. a type of root vegetable <----
D. is high in starch

2 answers

1. B - yes
2. A - no
3. B - no
4. C - yes

This is an excellent site for learning grammar.

http://www.chompchomp.com/
The first one is correct, the second is not
It would be down the street. Think of it this way, down. Down what? The street. That’s how I was taught. And the next one is incorrect also the appositive is Bill Gates because it’s in the comas. ,Bill Gates, the next is correct. So basically it’s
B
C
C
C