单项选择题
In 1969 two American astronauts _____ on the moon and w...
单项选择题In 1969 two American astronauts _____ on the moon and walked on its rocky, dusty surface.
You are a little overweight. I suggest you _____ Rosie’...
单项选择题You are a little overweight. I suggest you _____ Rosie’s example and start doing regular exercise.
The general manager is always busy. You should phone hi...
单项选择题The general manager is always busy. You should phone his secretary to make an _____ if you want to see him.
