PAST PERFECT / PAST SIMPLE1. I (to go) to work after I (to recover).A. went? had recovered B. went, have recover2. The conference (to begin) by 9 a.m.A. began B. had begun3. How you (to like) the weather?A. did … like B. have … liked4. When we went to the concert he (to join) us.A. joined B. had joined5. Alice wanted to know why her brother (to miss)the train.A. missed B. had missed C. has missed