It_______us many years to learn a foreign language （外语）well .

Don’t let ____ in. I’m too busy to see ____.

Linda, could we meet at 2 p.m. at the school gate— Sorry, I will be busy at that time. Let’s make it time.

Is your father at home—-No, he ________the USA.

I have many hobbies. I never feel ________ when I am alone.