I had been working on math for the whole afternoon and the numbers ________ before my eyes.
— Would you please help me carry this heavy box upstairs? — ______.
When the party was over, he ______ his friends good-bye and ______.
It was in 1969 ___ the American astronauts first succeeded in landing on the moon.
Country life provides him with peace and quietness, ______ what he can’t enjoy living in cities.
What the teacher said in class set all the _____ a lot.