一些高一英语的选择题,要理由,谢谢呐

一些高一英语的选择题,要理由,谢谢呐
The year 2010_______(see)remarkable changes in Shanghai's landscape
这里的see解释见证,答案是过去时,请问为什么不能用现完.
Where have you been? We __________you back earlier.
A were expecting B are expecting C have expected D expect
The guards standing at the entrance will see to it that no one______in without indentification.
A came B comes C has come D would come
If you apply for the position,the form ______be filled and retured within two days.
A is about to B is going to C has been to D is to答案是D为什么不选B?