—Cathy, did you attend the lecture given by Mr Black last night? —No. I ______ a report at the office.

— Have you heard from Jane recently?— No, but I ____ her over Christmas. 

Kate ________ on her new novel, which is supposed to come out next month.

Without this year’s Nobel Prize in physics winner Charles Kao’s idea of fibrotic（光纤的）communications, the “modern” telephone and Internet _________impossible．

All the scientific evidence ______ that increasing use of carbon dioxide ______ the rise of the earth’s temperature.