Помогите плиииз!!!!!!!!! Срочно!!!
Complete the sentences. Circle the right letter.
1 Unfortunately, we .... cut down the old trees in the park last year.
a) have to      b) will have to        c) had to
2 Where are the children?- They ... Lotto in the living room. 
a) are playing      b)play        c) played
3 They .... their work a month ago. Now there is a nice pond in the park.
a) start       b) started   c) have started