Give the correct from of the verb in bracket: If he (read) ... in bad light, he (ruin) ... his eyes

Give the correct from of the verb in bracket
1 if he (read)... in bad light, he (ruin)... his eyes
2 if people (go on)..., cutting down trees and destroying forests, there (be)... more and more floods
3 if they (use)... more cars, atmosphere (be)... more polluted
4 if your house (not be)... near your school, you (can/go)... by bus
5 if you want to call the porter, please (press)... this button
6 if you (need)... any help, just (ask)... me