单选题 Jim was so tired that he could not work ______.

单选题 The only ______ that may defeat him has decided to quit in the election.

单选题 A well-written composition calls for good choice of words and clear ______ among other things.

单选题 As soon as the observer saw what the children were doing, and noticed they could not accomplish the ______ task, she would attempt to help.

单选题 American women were denied the right to ______ until 1920 after many years of hard struggle.

单选题 Our group won the first prize under the ______ of the teacher.

单选题 They may employ her for the vacant position of Chief ______ Officer.

单选题 The secretary introduced a new ______ to all the colleagues at the office this morning.