He handed in the essay two days later than his classmates,but it was still _____the time limit set by the teacher.
Waves of red light are about twice as long as _______ of blue light.
Eventually, the husband could no longer ______ his wife’s complaints about his inability to make much money, and he divorced her.
Every year, _____ energy is spent on environment protection.
It is reported that the number of students_______ computer games has been on the increase in recent years.
People are advised to lay particular ____ the need of a balanced diet and proper exercise.