Some problems ___ in the lecture by Mr.Smith are very popular in our school, such as the waste of electricity, water and food, etc...
We will keep you _____ of our progress and look forward to hearing from you..
Don’t blame him too much! _______, he is a child of 5.
It ____ that all the students were having lessons in the teaching buildings when the earthquake occurred.
I’d prefer ______ in the office rather than _____ at home watching TV.
--Have you ever come to Anhui before? --No. It is the first time that I ______ here.