Answers are as follows
A. We will go out for a meal if the cook is absent.
B. Should................. the cook be absent, we will go out for a meal.
A. The thief may hide as much as he can; but he won't escape the police.
B. No matter.............. how much the theif hides, he won't escape the police.
A. My family has always been lucky; our luck is well known.
B. My family is famous.......... for always being lucky.
A. People all over the world watched the final match on TV.
B. The final match............. was watched on TV by people all over the world.