Translation:
1.Sophie is not yet 18 years old.
2.This male actor must be at least 40 years old.
3.Pavid can not possibly be here.
Revise:
1.What a fine day today(is)!
2.We are not going to see the film,are we?
3.She can not be reading.
Last.sorry if i have mistakes,welcome for others to correct them.:D