Verified answer

Test 37

1. expensive

2/ patient

3/ ambitious

4/ enthusiasm

5/ confidence

6/ impolite

7/ recently

8/ disappeared

Test 38

1/ truth

2/ rewrite

3/ waiter

4/ signature но можно оставит и sign

5/ suddenly

6/ success

7/ explanation

8/ inhabitants

Test 40

1/ description

2/explanation

3/ argument 

4/ valuable

5/ helpless

6/ careful

7/ dangerous

8/ cheerful