It is very difficult to get from one place to another in Tokyo because __________.

• A、the city is so large and so high

• B、there is no traffic

• C、we don't know the road 

• D、the city is so large and the traffic is so heavy

Dinosaur scientists can get information directly by ____________ .

• A、studying dinosaur fossils 

• B、examinipg modern animals

• C、watching dinosaurs

• D、using teles opes

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