单选
21 With our knowledge ________ practice, we can make contributions to our society.
A to base on B basing on C based on D base on
22 In order to have a good ________ of English, he determined to go abroad for further education.
A command B need C master D direction
23 As you write in the story, it has been 20 years ________I last saw you in a seaside hotel.
A when B before C after D since
24 who should be responsible for the accident?
-The boss, not the workers. They just carried out the order________
A as told B as are told C as telling D as they told
25 Have you seen Bob recently? I wonder _______ with his classmates in that school.
A how is he getting along B that he is getting along well
C what he is getting along D if he is getting along well
26 The employee you have been thinking highly ________ dishonest.
A of proving B of proves C of to prove D of being proved