Read the incorrect sentence and look at the corresponding diagram. The tennis team practiced every night, yet they still every match.

"team practiced" is on one line, each word separated by a vertical line. The words "The" and "tennis" are on a diagonal line under "team." The word "night" is on a diagonal line under "practiced." The word "every" is on a diagonal line under "night." "they match" is on one line, each word separated by a vertical line. The word "still" is on a diagonal line between the words "they" and "match." The word "every" is on a diagonal line under "match." The word "yet" is on a horizontal line between the two sentences. It is connected to the words "practiced" and "they" by dotted lines.

What must be added to this sentence?
a conjunction
a subject
a verb
a preposition