Richard was called in by the police to answer questions _______ the disappearance of Thomas Ripley, whose relatives were so ______ his present situation.

Since Claire had become attached to Tony, the robot needed _______________.

There were signs here and there, _____ visitors to look out for ______ rocks.

_________to reach them on the phone, we sent an email instead.

_____ is not only what you do, but also how you do it that makes the difference.