—How much shall I pay for the phone call?
—You________. This is free of charge.
| A．shouldn't | B．can't | C．don't have to | D．mustn't |
Now the world’s attention ______ the stocking markets, as they have great influence in the world’s economy.
| A．is fixing on | B．has fixed on | C．is being fixed on | D．had been fixed on |
Shopping online can save much time as you _______ go to a shop or walk around crowded
shopping centers.
| A．don’t have to | B．oughtn’t to | C．won’t | D．mustn’t |
___ there are living creatures in the outer space as those on Earth hasn’t been proved until now.
| A．How | B．When | C．Where | D．Whether |
With so many orphans _______, the charity organization calls for more donations.
| A．to look after | B．being looked after | C．to be looked after | D．looked after |
Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and
experts can’t be exactly sure about its use.
| A．had been found | B．was found | C．has been found | D．would be found |