1) was explaining
2) met
3) was listening
4) started
5) exploded
6) appeared
7) increased
8) was visiting, he bought
9) were cleaning
10) was cleaning
11) was living
12) was taking
13) arrived
14) were driving
15) dropped
16) did, was doing
17) found, was having
18) won, bought
19) was working
20) got, was
21) were swimming
