جمله اختلاف بين مدرسين

[mazen 2011]

المشاركة الأصلية كتبت بواسطة hericho

Scientists ........hard to find altervative sources of energy
try / have tried
his old age . my uncle is very energetic ...................
Despite / In spite of " دور ثانى 2011 " مع ذكر السبب " وهو فيه فرق بين الاتنين
Which model .....250kilometres per hour?

we can choose try but think we shouldn't put these choices together

in the second sentence there is a mistake both answers are write

goes

[scorpion1973]

since of course