Jackson school two years ago and he for two years.
A:leaves; has gone
B:left; has been away
C:leaves; has been away
D:left; has gone
____ +30=80
60+____=68
56-____=50
天山绵延几千里,不论高山、深谷,不论草原、森林,不论溪流、湖泊,处处有丰饶的物产,处处有________的美景。( )