The new technology has opened up a very wide _______ of possibilities.
A．extent B．number C．collection D．range
_______ the new medicine for a year and we’ll see how well it works.
A．Try out B．Make out C．Give out D．Pick out
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
