39.When you read the book, you’d better made a mark ____ you have any questions.
--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.
--The two pairs of shoes are __________ the same colour.--But they are different __________ colour.