he is expected back before 9 o'clockf this morning

______to this problem is expected to be found before long . My father is o--- this morning ,but he will be in this after He will come back ( )eight o'clock( )the morning. The homework is expected to finish before 6 o'clock.这句话对吗,是t 单选题：A ___ to this problem is expected to be found before lon A solution to this problem is expected to be found before lo back before nine o’clock. but this morning.he [get] up at seven o'clock. He() back home yesterday morning. Are you s____ to come back before 9 o'clock? Is Tom in this morning ? No,he is not____ 直到,2 o clock this morning that Mike came back home