Directions: Complete each of the following sentences with the proper word derived from the one given in the bracket.

　　81. I lost my keys and couldn’t ________ (1ock) the box.

　　82. No one knows where he came from. There is something _______ (mystery) about his family background.

　　83. What is left must be left to the ________ (imagine)of the reader.

　　84. His _______ (fail) to answer the question made the police suspicious.

　　85. People who have never gone to school are usually ________ (literate)

　　86. The president’s ___________ (patient) hurt many of the members and, as a result, he was not reelected for the following year.

　　87. ________ (Fortune) never come alone.

　　88. He was still wondering what had promoted her to buy such an _________ (practice) birthday present.

　　89. We feel certain that he is capable, that he will succeed, and that you will be ________ (pride) of him.

　　90. We wish that he had been a bit more _________ (adventure).