PLS HELP! 40 points! Fill in the blank with the correct verb to make sure the sentences are consistent.

When he
at the bookstore to unlock the door, Donovan already
a long line of customers ready to take advantage of the great
sales advertised for that weekend.

the words are..
will be arriving
arrived
is arriving
had
has

arrived, and had.

Explanation:

If you put these words in place of the blanks, it makes sense!

Hope this helps!

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation: