Hogy vannak helyesen ezek az angol mondatok?

A,He was ill and so fell behind his work.

B,He was ill and so fell behind with his work.

C,He was ill and so fell behind on his work.

D,He was ill and so fell behind for his work.

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A,When you will finish moving the furniture, please tel me.

B,When you finish to move the furniture, please tel me.

C,When you have finished moving the furniture, please tel me.

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A, If only they hadn't been staying in the building when the bomb exploded.

B,If only they hadn't stay in the building when the bomb exploded.

C,If only they didn't stay in the building when the bomb exploded.

D,If only they weren't staying in the building when the bomb exploded.

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A,He turned on the radio the moment I having left the room.

B,He turned on the radio the moment I leaving the room.

C,He turned on the radio the moment I had left the room.

D,He turned on the radio the moment I had been left the room.