1.

1. alone
2. lonely
3. only
4. isolated

2.

1. indoor
2. inward
3. relevant
4. flexible

3.

1. back
2. down
3. next
4. near

4.

1. reduce
2. revise
3. descend
4. delay

5.

1. besides
2. however
3. anyhow
4. anyway

6.

1. or
2. and
3. but
4. nor

7.

1. because of
2. adhere of
3. instead of
4. regardless of

(Reference keys.)