Trắc nghiệm: A chronic lack of sleep may make us  irritable and reduces our motivation to work.,A chronic lack of sleep may make us  irritable and reduces our motivation to work.,A chronic lack of sleep may make us irritable and reduces our motivation to work.,A chronic lack of sleep may make us irritable and reduces our motivation to work.,A chronic lack of sleep may make us  irritable and reduces our motivation to work.,A chronic lack of sleep may make us irritable and reduces our motivation to work,A chronic lack of sleep may make US irritable and reduces our motivation to work.