For each question, complete the second sentence so that it means the same as the first. Use no more than three words.
1 Scientists once believed that Mars had canals. Scientists once believed that there ................................. canals on Mars.
2 Before his accident Vincent was a careless driver. Vincent was a careless driver before he .................................. accident.
3 It was the first time she’d seen a tsunami. She ...................................... a tsunami before.
4 The spaceship had no power for two hours. The spaceship ...................... without power for two hours.
5 I haven’t had an accident for two years. The last time ............................ an accident was two years ago.