Hurry! The train _______. You know it _____at 8:30am. .
—Is the letter from your mother?—Yes.But she ________the letter herself,because she doesn’t even know one word.
________he referred to in his article was often discussed by many people in the past.
Social practice is an opportunity for students to gain________better understanding of how________society operates.
—I can’t thank you enough for the gift you sent me for my birthday the other day.—________.
The basic design of the car is very similar to________of the earlier model.