He had been _______ good terms with Tom, but all of ____ sudden they lost in touch with each other.
| A．on ; a | B．in ; / | C．on ; the | D．in ; a |
But for the help of my English teacher，I ________ the first prize in the English Writing Competition.
| A．would not win | B．would not have won |
| C．would win | D．would have won |
—It's the office！So you ________ know eating is not allowed here.
—Oh，sorry.
| A．must | B．will | C．may | D．need |
Keep up good state of mind even if you ________ fail plenty of times.
| A．must | B．will | C．can | D．should |
A left－luggage office is a place where bags ________ be left for a short time，especially at a railway station.
| A．should | B．can | C．must | D．will |
He was unhappy when he sold his guitar.After all，he________it for a very long time.
| A．has had | B．had had | C．has | D．had |