--- Diaoyu  Island belongs to China ---Surely it does! We Chinese will never ____it up

The doctor could ______ by the symptom that the patient caught flu.

The performance ______ nearly three hours, but few people left the theatre early.   

I tried my best to keep calm in face of the students, but the sweat on my forehead _____ me____.

The government spokesman has to____ his words before responding to reporters.