Nowadays the roles of husband and wife are not as   defined as before, especially when both partners work and earn money for the family.

—Credit cards are       useful when traveling.—True. They save us the trouble of taking too much cash.

He seems to be doing nothing, but _____ he is just waiting for his chance.

 With the doctor’s treatment, Sally feels____ better now.

In the good care of the nurses , the boy is          recovreing from his heart operation .