Complete the sentences

GIẢI THÍCH GIÚP MK VỚI Ạ
1.many housees have to be demolished to make ways for the roads( fortune)
2. If we don't ______ on electricity, there will be power cuts. ( economy)
3. although our team tried hard we played ....and lost the game ( success)
4. last year we..... one of our gifted students to take part in the competition( choice)