A subordinate clause is a clause that cannot stand alone as a complete sentence.
Subordinate clauses usually begin with subordinating conjunctions which link dependent clauses to independent clauses, such as for, as, since, therefore, hence, consequently, due to, though, provided that, because, unless, once, while, when, whenever, where, wherever, before, and after.
They can also begin with relative pronouns such as that, which, who, whom, whichever, whoever, whomever, and whose.
To identify a subordinate clause, there must always have a comma after it. When the main clause starts the sentence, there is no comma to separate it from the dependent clause.
Now, let's look over the sentence:
"As I was walking, I stumbled upon a beautiful seashell."
If we use this info, we can deduce that the answer is (A. As I was walking).
Answer: A tachometer measures the speed at which engine runs.
Explanation:
In the first blank space there should be a verb - measures and the second blank space is referring to what is measured, that is the speed.
A tachometer or revolution-counter is measuring the rotation speed and it is an instrument. The speed is shown on the display.
''Tachometer'' is the word that is considering Greek words such as tachos which means speed in Greek and metron which means measure. It is device used in automotive world and the other vehicles that has speed and speed measuring.
