1 If I __________ a lot, I __________. (study / get a degree)

2 My parents __________ if I __________ home on time. (get angry / not return)

3 There __________ a catastrophe, unless we __________ our environment. (be / protect)

4 If the weather is __________ we __________ swimming. (good / go)

5 He __________ if he __________ anything. (get hungry / not eat)