He looked as though he _________ a ghost(鬼).
It is suggested that some skills teachers ________ to teach the children in these mountainous areas .
Washington , a state in the United States , was named ________ one of the greatest American presidents .
– Jenny , how was your trip to Beijing ? - Oh , I missed it . I wish I ________ my vacation there .
_________ , his mother will wait for him to have dinner together .
The road condition there turned out to be very good , ________ was more than we could expect .