The man was to make some reply ______ his friend when he entered the room again.
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.
They suggested not only to the party but also give a performance.
The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.