Complete the sentences with the correct form of the words (give up on; cross; go ahead; widespread) 1. the government has decided to with plans to build a new motorway. 2. snowboarding is a between surfing and skiing. 3. predictions indicate that flying cars will become within 20 years. 4. he the idea of travelling for a year because he didn't have enough money.

1. The government has decided to go ahead with plans to build a new motorway.
2. Snowboarding is a cross between surfing and skiing.
3. Predictions indicate that flying cars will become widespread within 20 years.
4. He gave up on the idea of travelling for a year because he didn't have enough money.