What will happen when students depend too much on research tools ?

• A、They won’t make good use of books.

• B、They don’t copy work done by others.

• C、Their studies will be greatly improved.

• D、Their attention to things will last longer.

53.________.

Please tell him_________my train will arrive and ask him to pick me up.

• A、when

• B、how

• C、what

• D、whether