The form is very important. Please fill in the form ________ ink not ________ a pencil, Jack.
Dickson left his father’s firm and ____business on his own.
He has proved his courage in the battle. Through tests time and time again, this kind of rope____strong.
______, they couldn’t solve the mystery.
The police are going to______murder.
He was___the important of learning English and began to practise it every day.