2 If you send an email,it is free.
3 It is dangerous,if you don't wear a seatbelt.
4 If you have an injection,it doesn't usually hurt.
5 If you don't water plants and flowers,they die.
6 If the sea isn't calm ,it isn't safe to swim.
2 If you send an email,it is free.
3 It is dangerous,if you don't wear a seatbelt.
4 If you have an injection,it doesn't usually hurt.
5 If you don't water plants and flowers,they die.
6 If the sea isn't calm ,it isn't safe to swim.