(58)___

45.Why does the car rental company ask for the credit card number?

• A、To prevent the overuse of the car.

• B、To make sure that the car won't be damaged.

• C、To make sure the user return the car and pay for using it.

• D、To ensure that the car is safely and timely returned.

18.Children don't understand initially what they are reciting, but___it will have an impact on their thinking.

• A、casually

• B、especially

• C、regularly

• D、gradually