d off the environmental pollution.
4,邁克向他父親保證他一定會全身心投入即將到來的比賽上。
Mike assured hie father that he would put his whole heart into the 買粉絲ing 買粉絲petition.
5,一旦瑪麗下定決心就不會動搖。
Mary will never waver once she makes up her mind