You can choose one of the cars. A: cards B: cars

Suppose that the quantity demanded for cars exceeds the quantity supplied of cars. We would expect that:

In one day, Sue can change the oil on 20 cars or change the tires on 20 cars. In one day, Fred can change the oil on 20 cars or change the tires on 10 cars. Sue and Fred can gain from trade if Sue changes the ( ) and Fred changes the ( ). A: tires; oil B: oil; oil C: oil; tires D: tires; tires

中国大学MOOC: Drivers have to become familiar with these cars and what they can do. Many laws need to be 14) _______ to permit use of self-driving cars.

The number of the cars in the company is about eight ______, and ______ of them are new cars. A: hundred; two-thirds B: hundreds; two-thirds C: hundred; two-third D: hundreds; two-third

We offer various online reservation services, so you can check the schedule and purchase train tickets online for either coach cars or sleeping cars.

Fill in the blanks with the correct words or phrases from the word bank. 1. Rail cars are joined together with ______________ . 2. ________________ is joined using chains and hooks. 3. The yard master asked the worker to ____________ the incoming freight cars. 4. A buckeye couple relies on ______________ to latch cars together. 5. Because the cars were joined by a _____________ they could not be unlatched easily.

Small cars use less gas than large cars. The amount of gas that a car uses is ______________ to its size. A: forbid B: appropriate C: elated D: supply

What is Street Horizons? A: A federal government agency. B: A car removal center in Los Angeles. C: A place where old cars are fixed. D: An agency that tries to clear the cars.

中国大学MOOC: Speed limits could rise with more people using self-driving cars. When self-driving cars prove they can 6) ______ at higher speed limits, speed limits could be raised.