The country has been ______ war with its neighbor for almost ten years.
| A．in | B．on | C．at | D．during |
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 |
—Oh no! We're too late.The train________.
— That's OK.We'll catch the next train to London.
| A．was leaving | B．had left |
| C．has left | D．has been leaving |
—Could I use your car tomorrow morning?
—Sure.I________a report at home.
| A．will be writing | B．will have written |
| C．have written | D．have been writing |
Generally，students' inner motivation with high expectations from others________essential to their development.
| A．is | B．are | C．was | D．were |