Answer:
the word blew would make the sentence ironic.
"The mechanic <u>blew</u> a tire"
I believe it was around 80 Million
A prepositional phrase is such a phrase which begins with a preposition (on, under, over, etc) and ends with a noun, pronoun, gerund, phrase etc.
So here, the correct sentence will be "On the stage the members of the orchestra began to tune their instruments".