B.
<span>present perfect
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When combining two independent clauses, a comma must be placed between the two independent clauses in place of the conjunction. <span />
Answer:
The correct answer for this is : When a large star collapses it forms a massive blackhole. the fourth one is the anwer..
Answer:
You didn't include any survey...so it's 0
Explanation:
Answer:
to restore or improve something
Explanation:
