----- There must be a dozen pens in this house but I can never find one when I need one. ---- Keep looking. ____is sure to turn up.
The lift ______ and we were trapped inside it.
______ all my homework unfinished, I am not allowed to go online to play games.
A 3G mobile phone, ______to be most useful and fashionable, is popular with some teenagers.
She will have to ______ herself to the new condition.
—Where is that report? —I brought it to you _______ you were in Mr. Black’s office yesterday.