If ________ is in our plan，we can just have a walk along the sea．

1. A.
   relaxing
2. B.
   relaxed
3. C.
   enjoyable
4. D.
   enjoy

If________ is in your plan, then？

1. A.
   relax
2. B.
   relaxing
3. C.
   relaxed
4. D.
   relaxes

If________ is in your plan, then？

[　　]

If a tiny computer is placed inside the man's body, it can keep his heart ________.

1. A.
   beats
2. B.
   beating
3. C.
   to beat
4. D.
   beat