“thanks” is polite when someone has done you a favour, but saying it too often is quite another thing.
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?”------ “_____.”