—James didn’t turn up last night, did he?
—No. He _________.we had changed our plan.
| A．shouldn’t have come | B．needn’t have come |
| C．didn’t need to come | D．needn’t come |
In order to continue to learn by ourselves when we have left school, we must ________ learn how to study in the school now.
| A．in all | B．after all | C．above all | D．at all |
Unless they are programmed by humans, computers are nothing more than big pieces of metal. But once _____ what to do, they show extraordinary power in carrying it out.
| A．taught | B．teaches | C．teaching | D．to teach |
—Mr. Smith, I wonder if I could take Friday off?
— ______? It’s a bit difficult with so many people away on holiday, you know.
| A．How come | B．Is it necessary |
| C．Where are you going | D．Do you really have to |
After five days’ climbing in the mountain, they reached ____ they thought was the place they’d been dreaming of.
| A．that | B．where | C．which | D．what |
I’m moving to the countryside because the air there is much fresher than ____ in the city.
| A．ones | B．one | C．that | D．those |