Listen! Joy is singing in the next room.– It _____ be Joy. She has goneto America.

To use a foreign language effectively, you need to understand the culture________ it is spoken.

What did you think of our performance(表演) on the charity show—-Wonderful！I don’t think I can see a ______one.

____ person like him won’t be simply satisfied with ___ progress that has been made.

________ one and a half months enough for the project to be finished?—I am afraid not. The professor is ill and only after he recovers ________ go on with it.