Put the verbs in correct form using First Conditionals or Second Conditionals:
1 If it (stop) raining, we’ll go out.
2. If I had free time, I (join) a gym.
3. If they don’t leave now, they (miss) the train.
4. If I (find ) a wallet, I would take it to the police

1. children, men, women, wives, knives, half, mice, teeth, feet, elves, loaves, leaves, roofs, chiefs, passers-by, brushes, glasses, gases, bodies, trolleys, bunnies, potatoes, tomatoes, pianos, cactuses, mediums, phenomenons, categories, analyses, diagnoses, crises, criterions, funguses, oases, wolves, kidneys, sons-in-low, busses, watches, brothers-in-low, cargoes, donkeys, toys, datums, foxes, dishes, wrenches, geese, flashes, deers, sheeps, reeves, dwarves, churches, diaries, thieves, bushes, oxes/bulls, trophies, athletes, vetoes, armies.

1.
1) children
2) men
3) women
4) wives
5) knives
6) halves
7) mouses
8) teeth
9) feet
10) elves
11) loaves
12) leaves
13) roofs
14) chiefs
15) passer-by
16) brushes
17) glasses
18) gases
19) bodies
20) trolleys
21) bunnies
22) potatoes
23) tomatoes
24) pianos
25) cactuses
26) mediums
27) phenomenons
28) categories
29) analyses
30) diagnosis
31) crisis
32) criterion
33) funguses
34) oasis
35) wolves
36) kidneys
37) sons-in-law
38) buses
39) watches
40) brothers-in-law
41) cargos
42) donkeys
43) toes
44) datum
45) foxes
46) dishes
47) wrenches
48) geese
49) flash
50) deer
51) sheep
52) reef
53) dwarfs
54) churches
55) diaries
56) thieves
57) bushes
58) ox
59) trophies
60) athletes
61) vetoes
62) army

2.

1) a bag of
2) a bar of chocolate
3) a bottle of wine
4) a box of cereal
5) a bunch of bananas
6) a can of coke
7) a carton of milk
8) a cup of coffee
9) a glass of water
10) a jar of sugar
11) a loaf of bread
12) a piece of cheese
13) a tin of tuna