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[ashrafram]

49- some drivers have a sat-nav system in their cars
50- astronauts float in their space ships because of zero gravity
52- the moon has less gravity than the earth so you could jump higher there
55- I hope to do space walks one day
56- currently means at the present time.
59- he does gymnastics regularly to keep fit
60- spin means to turns round and rounds very quickly
61- Dina started saving to buy a present for her friend on her birthday
62-astronauts landed on the moon to do some repairs on the equipment
66- I will possibly come but i may not get back in time