用have,has,already,yet,ever,never,since或for填空,使句子完整、通顺

用have,has,already,yet,ever,never,since或for填空,使句子完整、通顺1.I have lived in Shenzhen _______ I was born.2.Have you packed your bag _____________?We are going to set off.3.I have ______ finished my homework,so I can chat with my friends on the Internet.4.Tom has been a soldier _______ three years ago.5.The Greens ___________ visited the Window of the World twice.6.The boy has stayed here _________ sixty days.7.—Where is Nancy?—She ________ gone to England to visit her grandparents.8.He hasn't finished the work _______.He still needs an hour.9.—Have you ________ visited the Great Wall?—No,I've _____ visited it.I hope to go there one day.10.—How long ________ they worked in Shenzhen?—_______ five years.