Tom’s uncle knows computers well, and he __________ a computer engineer .

Go and do it right now, and you _____ have my help when in trouble.

 I didn’t know Headmaster Weng was away for Beijing. I       to his office yesterday.

(2013·成都一诊)The chairman ________ hold office for five years according to the constitution.

---- What are you going to do this weekend?---- I don’t know. I      go to Beihai Park.