תקרה שאין עליה מעזיבה an uncemented roof comprising four-Tefachim planks what must be done to use this as a Succah?

1.   ?    Shaking the planks and removing every second one and re-placing it with Kasher Sechach.
2.   ?    Shaking the planks OR removing every second one and re-placing it with Kasher Sechach.
3.   ?    Remove every second one and re-placing it with Kasher Sechach.
4.   ?    Assur.
5.   ?    Machlokes all but D.

Gezeiras Tikrah is the opinion only of Beis Shamai.

1.   ?    True.
2.   ?    False.
3.   ?    Sofeik.
4.   ?    Machlokes A&C.
5.   ?    Machlokes A&B.

יש בהן ארבעה דברי הכל פסולה is an absolute there is no way to use them.

1.   ?    True.
2.   ?    False.
3.   ?    Sofeik.
4.   ?    Only for the last days.
5.   ?    Machlokes A&B.

It is permitted to use metal rods or bed-posts provided one leaves space between them equal to the rods themselves.

1.   ?    True.
2.   ?    One needs a little more space.
3.   ?    True, as long as the סכך is placed crosswise so there is more סכך than rods.
4.   ?    False.
5.   ?    All but D.

A Sukah whose Sechach comprises worn out clothes that are no longer fit for use is Kosher.

1.   ?    True.
2.   ?    False.
3.   ?    Even wool.
4.   ?    Machlokes A&B.
5.   ?    Machlokes A&C.