1. By whom it can be done

2. By whom can it be do

3. By whom can it be done

4. By whom can it be did

1. We were pleased with him

2. We are pleased with him

3. We are pleased by him

4. We will be pleased by him

1. taxation

2. taxing

3. taxably

4. taxable

1. brevity

2. shortness

3. briefly

4. None of these

1. for

2. upon

3. with

4. after