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

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 Jim was so tired that he could not work ____.

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

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

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

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