1.If you have something important to do,you_____waste any time.A needn't B mustn't2.Lily is always busy,and she ____ only five hours every day.A is sleeping B will sleep Cslept Dsleeps 3It's about one year since he____the army.Ajoined Bhas joined1.B

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1.If you have something important to do,you_____waste any time.A needn't B mustn't2.Lily is always busy,and she ____ only five hours every day.A is sleeping B will sleep Cslept Dsleeps 3It's about one year since he____the army.Ajoined Bhas joined1.B
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1.If you have something important to do,you_____waste any time.A needn't B mustn't2.Lily is always busy,and she ____ only five hours every day.A is sleeping B will sleep Cslept Dsleeps 3It's about one year since he____the army.Ajoined Bhas joined1.B
1.If you have something important to do,you_____waste any time.A needn't B mustn't
2.Lily is always busy,and she ____ only five hours every day.A is sleeping B will sleep Cslept Dsleeps 3It's about one year since he____the army.Ajoined Bhas joined
1.B 2D 3A

1.If you have something important to do,you_____waste any time.A needn't B mustn't2.Lily is always busy,and she ____ only five hours every day.A is sleeping B will sleep Cslept Dsleeps 3It's about one year since he____the army.Ajoined Bhas joined1.B
1.B选项有不可以 不能的意思 语气强烈 而A只是不需要的意思 如果你想要做一些重要的事,你不能浪费时间
2.主语是第三人称单数 而且是一般现在时 每天都如此 所以用D Lily经常很忙碌,她每天只能睡五个小时.
3.join是不能用完成时态的 如果要表达已经加入就要用has been in 自从他加入军队,只有一年时间.

1. mustn't不能强调强制性,needn't不必做某事
2. every day要用一般现在时,所以sleeps
3. it's+some time + since 后面不跟现在完成时的哦,不要混淆了
一般情况看到since+时间段,时间点要用现在完成时,但是是主句用现在完成时,it has been

1选B是因为你翻译 如果你有一些重要的事情要做。你就不能浪费任何一点时间;、而needn't是不需要的意思、
2这个真的没多少好说的肯定选D 这个代表一种习惯吧。我的理解。 你总不可能悬A正在睡。B将要睡C(过去)睡
3这个也是靠理解的你可以自己翻译 用has joined 就代表完成时 。。。。翻译有问题的...

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1选B是因为你翻译 如果你有一些重要的事情要做。你就不能浪费任何一点时间;、而needn't是不需要的意思、
2这个真的没多少好说的肯定选D 这个代表一种习惯吧。我的理解。 你总不可能悬A正在睡。B将要睡C(过去)睡
3这个也是靠理解的你可以自己翻译 用has joined 就代表完成时 。。。。翻译有问题的

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