This disaster ______ that people had no knowledge of first aid and they hadn’t known how to protect them-selves in face of danger.
| A．led to | B．contributed to | C．resulted in | D．lay in |
. The trouble is _____ we are short of hands.
| A．what | B．that | C．how | D．why |
The guide showed the travelers _____ of the factory.
| A．in | B．out | C．off | D．around |
We should mind our behaviour ______ public.
| A．at | B．in | C．on | D．out |
Excuse me, I have no ______ on me. Can you _____ the note of 100 yuan ?
| A．changes, charges | B．changes, change |
| C．change,change | D．changed, changed |
They made a bet _____the white horse.
| A．for | B．with | C．on | D．in |