Помогите)
Past Simple or Past Progressive?

1.  I (walk) home after the party yesterday.

a) walked         b) was walking

2.   He (drive) along the highway.

a) drove           b) was driving

3.   When I (arrive) my son (have) dinner.

a) was arriving, had    
b) arrived, was
having

4.   Our team (fly) to London for football game last night.

a) flew             b) was flying

5.   Mr Grey (not understand) what I (sing).

a)  wasn’t
understanding, sang   b)  didn’t
understand, was singing

6.   While we (work) my dog (hurt) its leg.

a) were working, hurt     
b) worked, was
hurting

7.   Kelly (enjoy) the evening but I (want) to go home.

a) enjoyed, was wanting 
b) was enjoying,
wanted

8.   When______ it (happen)?

a) did, happen     
b) was, happening

9.  He (sit) in the garden when Tom (come).

a) sat, was coming     b) was sitting, came

10.     When my mother (cook) the telephone (ring).                                                                                                            a) cooked, was
ringing    b) was cooking,
rang