Chia động từ trong ngoặc

1)The statue ò Liberty in New York is a monument which.............(symbolize) freedom .
2)We........(visit )Sydney Opera House for several times.
3)He'll be ill if he (not stop) ......worrying so much.
4)We'll go to the beach tomorrow if it (be) ......nice.
4)If I(have) .......onesymbolize million US dollars , I would build more parks in our  city .
6)There isn't a garden at house .If there were , we (grow).....vegetables.
Giúp mình vs mình cần gấp (cảm ơn :-))