Tony ____ the invitation, otherwise he would have attended your birthday party.

In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets.

We left the small town, _clearly _no need to stay．

The World Wide Web is sometimes jokingly called the World Wide Wait because it ____ be very slow.[ ]

I have no ______ to the plan, so long as itwill not cost too much.