I had not been asked to the party, so I felt ______ and a bit hurt.
The traditional approach___with complex problems in our studies is to break them down into smaller,more easily managed problems.
Vitamin D helps our bodies make a special chemical,and this special chemical, ____ , affects our brains,making us feel happy.
We should be able to do the job for you quickly, ____you give us all the necessary information.
— Mrs.Smith,please teach me how to draw on the computer today.—Oh,no. ____.You have to get familiar with the keyboard first.
Overpopulation is a terrible threat to the human race.Yet it is probably ____ a threat to the human race than environmental destruction.