it remains to be seen ____the new invention will do us a lot

it remains to be seen ____the new invention will do us a lot ( )it will do us harm or good remains to be seen ___ it will do us harm or good remains to be seen. whether it will do us good remains to be seen.帮我解释下,可以用wheth 在 How they will manage to do it remains to be seen.中： It remains to be seen whether they will enjoy it. It remains to be seen whether he will succeed. It remains to be seen whether I will succee it remains to be seen which country they will go. It remains to be seen ( )the bigger will It remains to be seen____it will do us harm or good to be honest,it will take us a lot of time to do that,but i