20 I haven't accused him __of__ anything,but I suspect him ___of___ having taken it.（suspect sb .of sth .疑心 某人干 某事）
21 Whatever made you think __of__ such a thing?(think of sth.想起某事)
22 We expect a great deal __from__ you,Smith.(expect ...from...期待.)
23 My hands smell __of__ soap.
24 They differ __from_ each other so much.(differ from 与.不同)
25 He invested a lot of money __on____ shipping.（invest money on sth.在某事上投资）
26 The film was based __on__ a novel by Dickens.（based on...基于/来源于）
27 Don't lean __on___ that shelf!You'll regret it.（lean on 靠着）
28 She often suffers __from____ colds.(suffer from 患.病)
29 We have embarked ____on__ a new scheme.
30 I believe ___in___ taking my time.
31 Jones was dismissed __from____ the firm.
32 They began by experimenting ___on___ rats.
33 Please concentrate __on____ what you are doing.
34 She prides herself __of ____ her clean house.
35 The climber failed ___on___ his attempt to reach the summit.
36 Many people escaped ___from___ prisons during the last five years.
37 We must economize ___on___ fuel.
38 He's never done any work.He lives ___on___ his mother.
39 He was employed ____in__ a factory before he joined the army.