The gentleman the little children followed suddenly stopped and looked as if __________ whether he was going in the right direction.
My mind wasn't on what he was saying,so I'm afraid I ________ half of it.
All the preparations for the task ________,and we're ready to start.
Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.
Visitors ________ not to touch the exhibits.
—Sorry,sir,your car isn't ready yet.It ________ by our workers.—Oh,my God,when can I come to fetch it?