Practice
Please translate the following sentences into English.
1.昨晚有人看到陌生人走进了那栋大楼。
2.我到那儿的时候，会议正在召开。 3.据报道，地震后许多人无家可归。
4.首先，产品的质量一定要保证。
5.昨天教授来到我们学校，受到了师生的热烈欢迎。

[Writing] 1.A stranger was seen walking into that building last night. 2.When I was there,the meeting was being held. 3.It was reported that a lot of people were homeless after the earthquake. 4.First of all,the products' quality must be guaranteed. 5.The professor came to our school yesterday and was warmly welcomed by the teachers and students.