Ⅱ根据汉语意思完成句子。 1.想知道这架飞机有多重是很困难的。 It's hard to know how heavy the plane is. 2.我还不能决定是否参加这个聚会。 I can't decide whether to go to the party or not. 3.随着时间的流逝，他忘记了那些不愉快的事情。 As time went by,he forgot those unpleasant things. 导航页导航页 Ⅱ.根据汉语意思完成句子。 1. 想知道这架飞机有多重是很困难的。 It’s hard to know ______ _________ the plane is. 2. 我还不能决定是否参加这个聚会。 I can’t decide ___________ _____go to the party __________not. 3. 随着时间的流逝,他忘记了那些不愉快的事情。 As time __________ __________, he forgot those unpleasant things. how heavy whether to or went by