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[tex]1.Jack had left the office before i arrived there \rightarrow When i arrived at........ 2.How long have you studied english? \rightarrow when........ 3.We bought a new TV. First we checked all the prices \rightarrow Before.......... 4.There will be a party at Mary's house next week \rightarrow Mary will.......... 5.He did not get married until he was thirty \rightarrow It was...... 6.It's a long time since our last conversation \rightarrow We haven't...... 7.We had no sooner finished the test than the bell rang \rightarrow Hardly........ 8.She had hardly left home when it began to rain \rightarrow No sooner........ 9.Mary bought this skirt last week, and has been wearing it ever since \rightarrow Mary has been..........[/tex]