用以下动词的正确的时态及语态形式填空
【小题1】Do you know what time breakfast __________(serve) in the hotel?
【小题2】So far we __________(test) the same group of sentences for 3 times.
【小题3】I __________(work) in a foreign trade company for five years. Still, I don’t regret having given up the well-paid post there.
【小题4】—Have you got your result of the final?
—Not yet. I was told that the papers __________(grade).
【小题5】The scientist has gone to Canada and he __________(give) us a talk when he comes back.