【题目】单词改错（每个句子有一处错误）
（1）He persuaded some people go back with him to Greenland.
（2）Biarni was hoping to join his father which was with Eric.
（3）Some fish can produce sounds twice as louder as your speaking voice.
（4）I tried to make my brother understand, but he was terrifying and stayed in the boat.
（5）The hikes costs $2,500 included all flights and accommodation.
（6）He asked Marco to serve in his court and sent him to do many important task.
（7）He was also confused by the black stones people used to burning for fuel.
（8）Later, these rocks proved that at one time in the distant past the Antarctic is covered by plants.
（9）They were hopeful that this would help to save energy, reduce pollution and provide free public transport to everybody.
（10）But a lot of people think that solar cars are either too slow nor unreliable.