_________ scientist like her won’t be simply satisfied with _________ little progress that has been made.
| A．The, a | B．The, / | C．A, / | D．A, the |
--- What’s the matter with Jason. He looks a bit upset.
--- Didn’t you know? When returning from his holiday last night, he found his house________.
| A．broken off | B．broken into | C．broken out | D．broken down |
Oh, it’s so cool in the house. You _______ have turned on the air-conditioner, haven’t you?
| A． should | B．might | C．must | D．can |
Fathers often feel __________ their duty to earn more money for their family.
| A．that | B．it | C．one | D．what |
--- ________ the class done most of the work?
--- Yes, but the rest ___________ rather difficult.
| A．Has, are | B．Has, is | C．Have, are | D．Have, is |
The problem lies __________ we are now giving him a fish, not teaching him to fish.
| A．in that | B．on that | C．in which | D．on which |