The question is asking us to re-write the sentence "Mustafa is an excellent long-distance runner, and the race was won by him last weekend. " The options are the following: 1) Mustafa is an excellent long-distance runner, and the race had been won by him last weekend. - there is no need for the past perfect, as the first sentence is in a present tense 2) Mustafa is an excellent long-distance runner, and he won the race last weekend. - this is the best option, there is no problem with it; 3)Mustafa is an excellent long-distance runner, and he win the race last weekend. i - this is grammatically wrong as we need a past tense in the last part; 4) Mustafa is an excellent long-distance runner, and the race was win by him last weekend - this is also wrong as you would have to say "was won"
