It was a time_______ the killer whales helped the whalers catch the baleen whales.
| A．when | B．that | C．then | D．which |
He studied hard, __________ the exam.
| A．aim at | B．aiming at passing |
| C．aiming passing | D．aiming to passing |
What makes us worried is that the number of people ______to drug is ________.
| A．addicted ; increased | B．addicting; increased |
| C．addicted ; increasing | D．addicting; increasing |
The boy became fatter and fatter each day and_____ made his parents sad.
| A．which | B．what | C．he | D．it |
This accident was______ his driving.
| A．due to | B．thanks to | C．because of | D．so as to |
Half a month passed and the boy ______ all his money, so he had to turn to his friends for help.
| A．ran out | B． ran out of | C．ran across | D．ran away with |