Im not really sure about these. But i just put what i think, correct if im wrong?

(Stretching for 210 miles,) the Thames is in England.
a. Prepositional phrase
b. gerund phrase
c. participial phrase <---
d. appositive phrase

(Singing loudly in the shower) is what Jessica loves to do every morning.
a. gerund phrase
b. participial phrase
c. appositive phrase
d. prepositional phrase <---

(Sam and Dean were shocked to find they both enjoyed playing soccer.)
a. subordinate clause
b. noun clause <---
c. simple sentence
d. complex sentence

The janitor told Principal Johnson he put the cleaning materials (where he always left it.) a. independent clause
b. noun clause
c. adverbial clause <----
d. adjectival clause

2 and 3 are wrong. The other two are correct.

Ok let me know if i get them correct.

2. b
3. d

Both are still wrong.

Im not really good at these. sorry

2. c
3. a

In order to determine the correct answers, let's break down each sentence and analyze the options:

1. (Stretching for 210 miles,) the Thames is in England.
The portion of the sentence in parentheses, "Stretching for 210 miles," is providing additional information about the subject ("the Thames"). It is modifying the subject and functioning as an adjective. This makes it a participial phrase, so the correct answer is (c) participial phrase.

2. (Singing loudly in the shower) is what Jessica loves to do every morning.
In this sentence, the portion in parentheses, "Singing loudly in the shower," acts as the subject of the sentence. It is a single verb form that functions as a noun, making it a gerund phrase. Therefore, the correct answer is (a) gerund phrase.

3. (Sam and Dean were shocked to find they both enjoyed playing soccer.)
In this sentence, there are no clauses or phrases acting as subjects or objects. It is a simple sentence consisting of a subject ("Sam and Dean") and a predicate ("were shocked to find they both enjoyed playing soccer"). Therefore, the correct answer is (c) simple sentence.

4. The janitor told Principal Johnson he put the cleaning materials (where he always left it.)
The underlined portion of the sentence, "where he always left it," functions as an adverbial clause. It provides additional information about the verb "put" and answers the question "Where did he put the cleaning materials?" So, the correct answer is (c) adverbial clause.

I hope this clarifies each answer and helps you understand the reasoning behind it.