How much ________ the pair of shoes— Twenty dollars ________ enough.

Can you help me ______ my ping-pong ball —Sure . It’s in your drawer .

I’d like the old people some housework.

Could you please have my car ready today?—Sure, the damage is not that serious, so it _____be ready by 5: 00 pm.

In the past few years, so many areas throughout the world have been hit by such destructive earthquakes, snowstorms and tsunamis ________ we have never experienced before, ________ makes us worried a lot about nature disasters