1. bought at the lower price is

2. the more inferior to the

3. one that we sell at a

4. slightly higher price

1. crucial problem

2. of the day

3. is

4. population explosion.

1. not to be bored

2. to be bored

3. to not be boring

4. to boredom

5. to feel boring

1. must have dropped

2. must drop

3. must be dropped

4. must be drop

5. must have drop

1. A amn"t I

2. am not I

3. am I not

4. not am I

5. aren"t I