Look at the mess the boys made! You _______ have taught them how to behave themselves.
| A．must | B．may | C．can | D．should |
Why should we elect him _________mayor? I mean last year he was elected as _________ member of the Congress and he has failed to keep any promise he made during the election.
| A．a; / | B．the; the | C．a; the | D．/; a |
. ----- I don’t have any change with me. Will you pay the fare for me? ------ __________.
| A．That’s all right | B．I don’t believe you |
| C．How dare you say that | D．Sorry, but that’s no excuse |
There is a notice board at the gate of the construction, _______ reads: Keep out without permission.
| A．which | B．on which | C．where | D．in which |
Completing all the homework by the dinner, John felt very tired. He __________all day long.
| A．was studying | B．studies | C．has studied | D．had been studying |
Though working outside, he is always ________ about his aging mother at home.
| A．satisfied | B．concerned | C．particular | D．excited |