As they waited Rahim argued against war ______
while his brother discusses the effects of pollution
while his brother discussed the effects of pollution
while his brother was discussing the effects of pollution
while his brother had discussed the effects of pollution
সঠিক উত্তর:
while his brother was discussing the effects of pollution
ব্যাখ্যা ও নোট:
অতীতের দুটি কাজ একসাথে চললে While যুক্ত অংশে Past Continuous ব্যবহৃত হয়।