61.His subtle smile made him curious.

　　62.Boys have a strong tendency to fight than girls.

　　63.Freedom of action is one of inviolable rules of human behavior.

　　64.Their furniture was chosen for utility rather than for elegance.

　　65.He welcomes us with artificial smile on his face.

　　66.A doctor like him is a disgrace to our hospital.

　　67.He was so steadfast to his principles that we couldn't move him.

　　68.Her thrift saved her enough money to buy a house.

　　69.Her father gave her the alternative of doing A or doing B.

　　70.Vegetables are widely known for their health benefits.