.
They ___ out because the light’s on. Let’s go upstairs and have a look.
| A．mustn’t go | B．can’t have gone | C．couldn’t go | D．might have gone |
They say that ____Chinese language is particularly difficult for ____ European.
| A．the; an | B．/; an | C．the; a | D．/; a |
It remains ______ whether he will pass the exam this time.
| A．to see | B．to be seen | C．to be seeing | D．seen |
Spain will be terribly hot in August and _______ we can’t afford a holiday abroad.
| A．anyhow | B．somehow | C．however | D．therefore |
Has all______ can be done _______?
| A．/; been done | B．/; done | C．that; done | D．that; been done |
It’s hard to imagine what progress they _________ in the past few months.
| A．have found | B．have got | C．have paid | D．have made |