1 receives, studies, never forgets
2 go, feel
3 doesn't remember, doesn't seem
4 is watching, watches, goes
5 are you doing
6 am trying, listen
7 is washing
8 washes
9 Do you always lock
10 is snowing, seldom snows
11 is seeing
12 has
13 think
14 am thinking
15 costs
16 is raining, don't have
17 sleep, get up, brush, have, go, never miss
18 doesn't want, are going
19 does the plane take off?
20 are having