Question

Can you make sure_____? A.that he will come here today B.when he will come here today

为什么选A呢？我觉得B 意思上也说得通啊。。。。
另外，当直接引语变成间接引语的时候，为什么从句中的what was the matter 不用把was放到后面呢（what the matter was）？是不是有某些类型的句子是这样的？比如what's wrong

Answer 1

B when 与 today 矛盾， when 什麽时候 不知是何时，today今天,有明确的时间表示，所以矛盾。
sure that 这个是固定的，不正确， that只是引导宾语一个从句，不起任何的作用，可省略。所以A正确。
当直接引语变成间接引语的时候，如果从句是特殊疑问句，语序不变。而给出的例子中，what是疑问代词作主语，be 动词（was)作谓语，the matter 作宾语

Answer 2

相信我，我问过native speaker

首先说这个句子用make sure 是不准确的，应该用be sure
make sure 是 do something to ensure, 即确保
Make sure you lock the door before you leave the room.
而 be sure 是 assure oneself 即确定。
确定和确保的区别，应该不难理解。
所以你的句子应该是
Are you sure that he will come ....?

如果你要说“你能确保他来吗”，应该说
Can you guarantee that he will come here today?

你可以说 i am not sure when he will come
但不能说 i am sure when he will come. 否定句地道，肯定句不地道。
因此 你可以说 aren't you sure when he will come ?
而不能说 are you sure when he will come ?

what was the matter 是个特殊情况 the matter 相当于 wrong .
I don't know what was wrong. 而不是 I don't know what wrong was. 因此
I don't know what was the matter，而不是 I don't know what the matter was.

但通常情况下都是如下：
I don't know what his name is 而不是 I don't know what is his name.

Answer 3

你能确定他今天会来这么。

sure that 这个是固定的