Complete the sentences with the correct form of the words (give up on; cross; go ahead; widespread) 1. The government

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.