–I think it’s going to be a big problem.--Yes, it could be. --I wonder ________ we can do about it.
-How do you like our town ? -_________. It’s worth visiting a second time .
“This month our family has used ______ water as we did last month.” said Mother .
The information tells me that the way of education in Canada is quite different from _____ in China .
I was surprised ______little birds could eat ______ many insects in ______ a short time.
The headmaster wanted the new classroom building to be _________ as soon as possible .