The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
I hate _______ if people say such things in public.
I dislike _______ when others laugh at me in publicorthink poorly of me behind.
Yes, ______ is difficult to find a job nowadays, but _____ is more difficult is try to find such a job with a high salary but little things to do.
. Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
I know ______ is important to know my own limitations, but _______ is difficult is to help others to know their own limitations.