句型： 1) we feel very much honored this evening to have a chance to get together with…2) on behalf of all the teachers and students in our university, allow me to extend our warm welcome and greetings to our distinguished guest…3) i hope professor … will enjoy his study in our university.ladies and gentlemen,we feel very much honored this evening to have a chance to get together with professor smith. allow me, first of all, on behalf of all the teachers and students in our university, to extend our warm welcome and greetings to our distinguished guest who comes from so far away. i hope professor smith’s visit will promote the friendly relationship between our two universities.professor smith has been engaged in the study of english linguistics and has turned out many academic works. i am sure he will give us much valuable advice on linguistic research. finally i hope professor smith will enjoy his stay in our university.l useful expressions1) i am privileged to extend, on behalf of all present here, our warm welcome to…2) tonight we especially invite professor smith to address us on…3) now, let us invite professor smith to speak to us. ladies and gentlemen, welcome professor smith.