A sign is a kind of language. Here are some of the signs you can see on the roads.
Please look at the first sign. It´s the sign with the number “thirty” on it. When driver see this sign, they must not go at more than thirty kilograms an hour. We must drive carefully when we see the second sign, because we are getting close to a cross road now. The third sign tells us there is a hill. Number four shows that the road gets narrow, so it is necessary to drive slowly and carefully. The last sign with the word “school” on it means there is a school at the street. Drivers must look carefully and go slowly in case hitting the children.
A． | B． | C． | D． |
| A．Australia | B．Canada | C．the UK | D．the US |
| A．say; writing | B．says; write | C．says; writing | D．say; write |
| A．can | B．shouldn’t | C．must | D．should |
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