Twenty boats left Tianjin, for the east at high speed.
The reason__________ their failure you know is they didn't get fully prepared for the experiment.
--Why has he been staying at home these days? --He ___________ since a month ago.
The president of the country was well_________ of when he was in power.
The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.
Mr. Smith__________ the roll of film as soon as he arrived home