16.Nobody knows who is the first one to add fertilizer ___ the soil to make plants grow better.
---Look at the girls swimming over there! How wonderful!---Yes, ______ they were the fishes!
He ______ for Shanghai this Friday, and he wonders when the first train ______.
With the help of the doctor, the patient was ______ recovering from his heart trouble.
You will ______ your chance of the job if you wear the pair of slippers like this!
Leaders should be careful not to act beyond their ______ and do things against the law.