за правильный ответ,нужно вставить пропущенные слова в другой форме
Martin and his family like to go to the countryside. They often 1)(have) picnics, which Martin 2)(like) very much. Last week they and their friends 3) (go) to a small lake. While his parents 4)(cook) meat, Martin 5) (play) in the sand. He 6)(work) on the towers for his sand castle when he 7)(see) something interesting in the sand. It 8)(look) like a coin, but Martin thought, “I 9)(never / see) such coins.” He 10)(take) the coin and 11)(run) to his parents. Father asked Martin, “What 12)(you / bring)?”. Martin 13) (show) the coin to his father and asked, “14)(you / know) what it is?”. Father 15)(not have) any answer. He said, “Let’s ask my friend David, he is a history teacher. Look, he 16)(stand) near the big tree.” They 17)(give) the coin to David. David 18)(study) the coin carefully and 19) (say) , “It 20)(be) a coin of the 19th century. Tomorrow we 21)(go) to the city museum to show it to the specialists.”
1) have
2) likes
3) went
4) were cooking
5) was playing
6) was working
7) saw
8) looks
9) have never seen
10) took
11) ran
12) have you brought
13) showed
14) Do you know
15) hasn't had
16) is standing
17) gave
18) studied
19) said
20) is
21) will go