根据句意，用所给单词的适当形式填空。

小题1:His father used to smoke very ____________ (heavy).

小题2:When they saw their favourite film stars, they shout with ____________ (excited).

小题3:Though the old man is in his ____________ (nine), he is still very healthy.

小题4:The house is on fire, we have to run out for ____________ (safe).

小题5:Though he was born in France, he can’t speak ____________ (France).

农业自然条件