Experts think that ____ recently discovered painting may be ____ Picasso.
| A．the;/ | B．a; the | C．a;/ | D．the; a |
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A. can; mustB. can; may
. must; can D. may; must
I am not fond of ______ music very much, but I do like ______ music they are dancing to.
| A．不填; 不填 | B．the; the |
| C．the; 不填 | D．不填; the |
A survey has found that many medical workers would not choose the profession __________ a second chance, citing high stress and tense patient-doctor relationships.
| A．they were given | B．they will give |
| C．they should give | D．should they be given |
— Was it 11 o'clock your father came back last night?
—Yes, he is always coming back so late.
| A．that | B．while |
| C．when | D．until |
—I failed in the driving test again .Sorry to let you down.
—_________? I’ve helped you practice enough.
| A．So what | B．Why not |
| C．Who knows | D．How come |