1. Abandon : desert ; leave whitout planning to come back ; quit

a. When Roy abandoned his family the police went looking for him.

b. The soldier could not abandon his friends who were hurt in battle.

c. Because Rose was poor she had to abandon her idea of going to college.

2. keen : sharp ; eager ; intense ; sensitive

a.  The butcher's keen knife cut through the meat.

b.  My dog has a keen sense of smell.

c.   Bill's keen mind pleased all his teachers.

3. Tact : ability to say the right thing

a. My aunt never hurts anyone's feelings because she always uses tact.

b. By the use of tact Janet was able to calm her jealous husband.

c. your friends will admire you if you use tact and thoughtfulness.

4. Jealous : afraid that the one you love might prefer someone else ; wanting what someone else has

a. A detective was hired by the jealous widow to find the boyfriend who had abandoned her.

b. Although my neighbor just bought a new car a am not jealous of him.

c. Being jealous Mona would not let her boyfriend dance with any of the cheerleaders.

 5. Oath : a promise that something is true ; a curse

a. The president will take the oath of office tomorrow.

b. In court the witness took an oath that he would tell the whole truth.

c. When Terry discovered that he had been abandoned he let out an angry oath.

6.Vacant : empty ; not filled

a. someone is planning to build a house on that vacant lot.

b. I put my coat on that vacant seat.

c. When the landlord broke in he found that apartment vacant.

7.Hardship : difficulty

a.The fighter had to face many hardships before he became champion.

b. Abe Lincoln was able to overcome one hardship after another.

c. On account of hardship Bert was let out of army to take care of his sick mother.

8.Gallant : brave ; showing respect for women

a. The pilot swore a gallant oath to save his buddy.

b. Many gallant knights entered the contest to win the princess.

c. Ed is so gallant that he always gives up his subway seat to a woman.

9.Data : facts ; information 

a. The data about the bank robbery were given to the F.B.I.

b. After studying the data we were able to finish our report.

c. Unless you are given all the data you cannot do the math problem.

10.Unaccustomed : not used to something

a. Coming from Alaska Claude was unaccustomed to Floridas's heat.

b. The king was unaccustomed to having people disobey him.

c. Unaccustomed as he was to exercise Vic quickly became tired.

11. Bachelor : a man who has not married

a. My brother took an oath to remain a bachelor.

b.In the movie the married man was mistaken for a bachelor.

c.Before the wedding all his bachelor friends had a party.

12.Qualify : become fit , show that you are able

a. I am trying to qualify for the job which is now vacant.

b. Since Pauline cannot carry a tune she is sure that she will never qualify for the Girls Chorus.

c. You have to be over 5 foot to qualify as a policeman in our town.