4) there are some / there aren't any
volcanoes in the uk​

1.when was the radio invented? 2.the book was written by pushkin. или: was the book written by pushkin?

how much sugar do you need for the cake ?   there aren,t many beans in the tin.  are there many mangoes left ?   i have got a lot of of butter in the fridge.  how many biscuits do  you want ?  

i want to go to camp,because i want to tace a rest. besides i want to enjoy my holidays.i think i will get many new friends . there are always many foreigners in the camps,from all over the world. i will improve my english knowledge. but i'm afraid i will miss my mother and my family. that's why sometimes i don't want to go to camp. but my family gave me an advice to go there and enjoy holidays with friends. they think,that they can call me sometimes, and i will not miss my family.

1-с, т.к. после who ставится is, но т.к. есть last sunday как показатель прошедшего времени ставим was.  2-а, т.к they-множественное число, из предложенных вариантов подходит только а))