93. If you can speak very ______ English, you will have more chances to find a job than others.
The stone on the river bank rolled under her feet; she was _____into the river,and she called out for help.
-Everyone says you are a good student. You are never late for school,are you? -_______.
_____ all the inventions have in common is ______ they have succeeded.
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
A cook will be immediately fired if he is found ______in the kitchen.