1. haven't heard
2.didn't succeed
3.last time I've seen
4.accused his assistant for giving
5.did you start studying
6.aren't old enough
7.didn't strike
8.be aware of
9.is said to be owned
10.has been six years since
11.in a happy mood
12.get rid of
13.gave me permission to
14.to lower down
15.never gotten such a
16.may have went
17.rather wouldn't give
18.have not planned
19.prefer not to work today
20.is the reason
21.get along well
22.put up with
23.will likely