这几题答案我都知道...想知道其中一些选项的详细解释...请大家帮忙回答下谢谢~可以追加悬赏。1.This kind of glasses made by experienced craftsmen ____comfortably.我知道是wears但为什么选wears而不用is worn想要个具体解释。 2.He reads newspapers every day to keep himself ______about what is going on in the world .为什么选informed 而不是 being informed?3.The palace caught fire three times in the last century ,and little of the original building_____.为什么选remains 而不是is remained.4.There were many talented actors out there just waiting _____.为什么选to be discovered 而不是being discovered或discovered?