Misc: who wrote the opera 'the giant'?

Questions

Don't Strain Yourself Thinking ;-) : A brown crayon is what color?

Don't Strain Yourself Thinking ;-) : A smoke detector will alarm if it detects _____.?

Don't Strain Yourself Thinking ;-) : A water heater keeps _____ warm for you.?

Don't Strain Yourself Thinking ;-) : Although not all come from France, ______ fries are often served with hamburgers.?

Don't Strain Yourself Thinking ;-) : An _____ clock usually wakes you in the morning.?