—You may find the key to the math problem on page 107.—Ah, it's so simple. I wonder why I _____ of that.
If _____ carefully, the experiment will be successful.
It would be a good idea to use a plastic bottle, ___cut off, as a container to grow young plants in.
The judge paid no attention to _____ he had just lost his wife.
Who would you rather ______ the report instead of you?
-----“She's not a dancing teacher, is she?” ------ “_____.”