ne knows that _____ is dangerous to play with fire, but _____ is difficult is to prevent children from playing with fire.

__Sorry to_____ you , but could I ask you a quick question? __No problem. [ ]

Every month he measures his baby daughteragainst the wall to see how much ____ she is getting

Excuse me, when will the train G160 arrive— Wait a minute please! I’ll _______ it for you.

President Xi Jinping often says that China dream only by many years of hard work .