Present ou present perfect ?

Choisissez la forme verbale appropriée.

1. Il travaille quarante heures par semaine. : ... is working works has worked worked has been workingworks
2. Il a beaucoup travaillé la semaine dernière. : ... is working works has worked worked has been workingworked
3. Elle est fatiguée, cela fait trois heures qu'elle travaille. : ... is working works has worked worked has been workinghas been working
4. Elle travaille depuis cinq ans dans cette usine. : ... is working works has worked worked has been workinghas worked
5. Tais-toi, il travaille. : ... is working works has worked worked has been workingis working
6. Ça ne marche pas. : ... has never worked does not work did not workdoes not work
7. Ça ne marchait pas il y a deux semaines. : ... has never worked does not work did not workdid not work
8. Ça n'a jamais marché. : ... has never worked does not work did not workhas never worked
9. Il a écrit un article sur ce sujet. : ... wrote has written writes has been writinghas written
10. Il y a quatre ans, il a écrit un article sur ce sujet. : ... wrote has written writes has been writingwrote
11. Cela fait dix ans qu'il écrit pour The Economist. : ... wrote has written writes has been writinghas been writing
12. Il écrit pour The Economist. : ... wrote has written writes has been writingwrites