In the near future, more advances in the robot technology _______ by scientists.(2011 .湖南)
Fred’s math is said to be the best in our class, but unbelievably, he passed the last exam.
—What a beautiful day!—Yes. It's ____ that I'd like to take a walk.
People have heard what the President has said; they are waiting to see ____ he will do.
Last night the party lasted five hours _____ it was over.
—Did David make his model plane himself?—He ___, because he doesn't know much about model plane.