42. I can't get my boots _____. They are too tight.
Don’t worry if you can’t come to _______ party—I’ll save _______ cake for you.
I can’t remember when exactly the Robinsons left _______ city. I only remember it was _______ Monday.
Sugar is sold by _______ pound, petrol by _______ gallon.
—Did you enjoy yourself yesterday?—Yes. As you saw, party went on in _______ most pleasant atmosphere.
What _______ public is concerned about is whether medical workers and scientists will be able to find _______ cure for this new disease after the vaccine(疫苗) is tried on volunteers.