…Was it in the park ______ you met Tom yesterday? … Yes..
Are they still doing the experiment? They're supposed______it by the end of last class.
-Hi, I didn't know you had come back! Have you finished your teaching in America? -Yes. I______Chinese there for more than two years.
Better be more careful______you've made a mistake.
-What about______party you went to yesterday evening? -Oh, it was boring, you know, party like that!
25.A heavy drought is hitting the south-west part of China, ______severe problems for hundreds and thousands of people and cattle to get fresh drinking water.