1. It ´s already 9 pm and I don ´t think there ´s anyone at home. OUT It ´s 9 pm so they ...earlier in the evening. ???
It ´s 9 pm so they must have gone out earlier in the evening.
2. Emma says they ´ll be going out only of Pete ´s condition improves. UNLESS Emma has refused to ..... better. (I can ´t think of a correct answer only using between tow to five words! Apart from that, the beginning of the second sentence makes it impossible to rephrase it and keep the same meaning of the given sentence.)
I think you meant " only if Pete ´s condition" then you might get something like this
Emma has refused to go out with Pete unless his condition gets better
3. Do you think you could help me with the cooking tomorrow? HAND Will you be able...to give / lend me a hand ... with the cooking tomorrow?
OK
4. Why water the garden if it ´s going to rain? POINT If it ´s going to rain, is ... there any point in watering ... the garden?
OK
5. "It ´s getting late so I think I ought to go now", said Mr. Healey. BE "It ´s getting late so I really ... ", said Mr. Healey. ???
I really must be off
6. There probably won ´t be another train to Oxford tonight. UNLIKELY It ... is unlikely to ... be another train to Oxford tonight.
Well, that �s weird ... The only thing that came to my mind is "It �s unlikely that there will be another train ...."
7. My teacher says it ´s alright to use the internet when I do my homework. WRONG My teacher says there ´s ... nothing wrong with / about using ... the internet when I do my homework. (Are both prepositions correct? I always use "with" but my student has used "about")
OK
8. I ´ve always wanted a brother or sister. WISH I really ... wish I had ... a brother or sister.
OK
9. Paul will translate the article into English for us. GET We ... will get Paul to translate .. the article into English.
Ok
10. People say too much sun can damage the skin. SUPPOSED Too much sun ... is supposed to be ... bad for the skin.
Ok
11. It is forbidden to park here. NOT Parking ... is not allowed / permitted ... here.
OK
12. Mary and Jane are very good friends. ON Mary and Jane ... get on (well) ... together. (Is it necessary to use "well"?. As far as I ´m concerned, the positive meaning is already implicit in the phrasal verb)
Mary and Jane are getting on well (with each other)... Yes, well should be there, IMHO...
13. I don ´t know why Anne got so upset. MADE I don ´t know ... what made Anne get ... so upset.
OK