He will have learnt English for eight years by the time he _____ from the university next year.
Great changes have taken place in that school, it is no longer ________ it was 20 years ago, ________ it was so poorly equipped.
The way he did it was different ______we were used to .
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
The place _______ the bridge is supposed to be built should be________the cross-river traffic is the heaviest.
The shopkeeper did not want to sell for ________ he thought was not enough.