Read the excerpt from "the enigma machine.”
at bletchley park, the main site in britain where enigma codes were deciphered, six thousand messages were decoded every day by a staff of ten thousand men and women. many of the messages were inconsequential, but more than a few were critical to the outcome of the war.
which is the best summary of this paragraph?
at bletchley park, thousands of people worked hard to the british and allied troops during the war.
at bletchley park, the ten thousand people on the staff figured out over six thousand codes, some of which were very important to the war effort.
ten thousand people worked at bletchley park, but some of the codes they solved were inconsequential to the war effort.
six thousand codes were figured out at bletchley park, including some that had importance in regard to the war.

a complex sentence consists of an independent clause and one or more dependent clauses.  

to write complex sentences, we must use subordinating conjunctions.  

all the complex sentences begin with a subordinating conjunction and when it occurs, a comma must be place at the end of the dependent clause. on the contrary, if the sentence begins with an independent clause, then no comma is used.

after  

although  

as  

because  

before  

if  

since  

when  

for example,  

after she won the competition, she became very popular.  

although my father was hurt, he continued fighting for his rights.  

as all of you got a ten, you will be able to leave early today.  

before he went to the war, he asked his parents to bless him.  

if it is cold, i won’t go out.  

since you didn’t bring the homework, you will get low grades.  

when it is hot in the town, everyone goes to the beach.  

if this is referring to star wars, han shot first.