Question

which is the best way to complete the text?
lisa was an experienced speed chess ______ still struggled with the pace of competitive tournaments.
player so
player but
player, but
player; but

Explanation:

The sentence shows a contrast between Lisa being an experienced speed chess player and her struggling with tournament pace. First, we need a noun to complete the first clause: "player". Then, a coordinating conjunction "but" is needed to show contrast. Since the first part is an independent clause ("Lisa was an experienced speed chess player") and the second is also an independent clause ("[she] still struggled with the pace of competitive tournaments"), we need a comma before "but" to correctly join the two independent clauses with a coordinating conjunction.

Answer:

player, but