---Has your father returned from Africa yet? ---Yes, but he ____ here for only three days before his company sent him to Australia．

—Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here.

China is embarrassed by such a fact: Chinese visitors______ rubbish on the Great Wall, followed by a foreigner picking up the litter.

— I rang you up last night, but nobody answered.— Oh, I usually ________ off my phone at about 9:00 p.m.

 He _____in London for many years, but he has never regretted his final decision to move back to China.