阅读下面短文，用括号内所给动词的适当形式填空(必要时可加情态动词或助动词）。
“Everything happens for the best," my grandmother said whenever things weren't going my way. "Don't worry, one day your luck ____ (change). "
Grandmother was right, as I discovered after graduating from college. I had decided to be sports announcer (广播员) in a radio station, so I ____ ( go) to Shanghai and knocked on the door of every station. But I got refused every time.
In one station, a kind lady said my problem was short of experience. " Get some work with a small station and ____ (work) your way up ," she said.
I couldn't get a job there, either. Then my dad told me a businessman had opened a company and needed someone ____ ( manage) the sports center. But again, I didn't get the job.
I felt really down. "Your luck will change," Granny reminded me. I tried another radio station in Beijing. But the owner, a nice man, told me he already had someone.
As I left his office, I asked, " How can someone be a sports announcer if he ____ (not, get) a job in a radio station?"
I ____ ( wait) for the elevator when I heard the man call, " What was that you said about sports? Do you know anything about football?" I ____ (put) in front of a microphone and asked to imagine I was commenting (评论) on a football game. "Now you ____ (watch) the football game between Lu Neng and Shen Hua. . . "
On my way home, Granny's words came back to me, " One day your luck will change, boy. And when it ____ ( happen) , it’ll feel twice as good because of all the disappointment (失望) you ____ ( have) . " At that moment I knew just what she meant.
，下列做法正确的是（ ）