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