I have written to him because he phoned me shortly afterwards.
| A.ought to | B.must | C.couldn’t | D.needn’t | 
 “When did you became an actor?” “_______ 1995, when I graduated from college.”
| A.After | B.In | 
| C.From | D.Since | 
 “How long have you been an actor?” “_______ 1995, when I graduated from college.”
| A.After | B.In | 
| C.From | D.Since | 
 Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed
| A.which | B.since | 
| C.because | D.because of | 
 The writer is not satisfied with _______ buses are too crowded.
| A.that | B.which | 
| C.what | D.the fact that | 
 Their belief is proved by the fact that the death penalty prevents murder.
| A.that | B.which | 
| C.what | D.the fact that |