My heart always ___________ faster when I speak in public.

That company is said ___________ a new kind of robot in their production last year.

The fact suggested that the water _______ and to prevent this from happening again, John Snow suggested that the source of all the water supplies ______.[ ]

How much is _____ for a schoolbag— Experts say students should carry _____ more than 10% of their body weight．

Ten dollars is not enough to buy the bag. Could you give me ________ dollars, mum