限时训练
1.It’s two years since Mrs. Green came to China.
点拨：It’s + 时间段 since + 从句(过去时) ---自从…以来，时间过去多久了，It’s还可以用It has been替换.
练习：a.自从他离开祖国到现在已经有两年半了。It’s _____ _____ __ ______ years since he ______ his motherland.
b.自从最后一次见面到现在已经过去很久了。It _____ ______ a long time since I _____ him ____ _____ time.
2.There are many places of interest which attract millions of tourists from all over the world every year.
attract (v.)---吸引，使喜爱
链接：attraction( 词) ---爱慕，吸引；
attractive（ 词）---英俊的，诱人的
练习：展览会吸引了成千上万的参观者。
The exhibition has _____ __ _________ __ __________.
