Mike, it’s a pity you didn’t come to last night’s concert. Itwas really great! -Really? If I _____ so busy, I would have gone with you. [ ]

He was _______ at the _______ waste of food in the school. [ ]

He has a habit of keeping his arms_____ when talking to others, which I personally think _____ impolite to his audience [ ]

Lucy’s new job paid twice as much as she had made ________in the restaurant.

_____more countries can use natural energy in the future remains to be seen