用所给所给词的适当形式填空。(5)She used to _________(go) to school by bike.
He has gone to Shanghai on _______(busy)
The government has _____(take) action to improve the environment.
It is __________(possible) for me to do too many things in two days. Can you help me?
When I walked in the field, I saw a ________(die) bird there.