改同义句My mother is ill.l must look after her at home.

改同义句My mother is ill.l must look after her at home.
My mother is ill.l must look after her at home.
My mother is ill.l _ _ look after her at home.
At last my parents went to beijing by plane.
_ _ _my parents went to beijing by plane.
The girl is afraid to go out alone at night.
The girl is afraid _ _out alone at night.