After just one film, Elizabeth Taylor was hired by MGM, and became a child star with National Velvet, ______ opposite Mickey Rooney.
| A．to star | B．starred |
| C．starring | D．being starred |
Between the two parts of the concert is an interval,________ the audience can buy ice-cream.
| A．when | B．where | C．that | D．which |
The printer is of good quality. If it ________ break down within the first year, we would repair it at our expense.
| A．would | B．should | C．could | D．might |
They use computers to keep the traffic _________ smoothly.
| A．being run | B．run |
| C．to run | D．running |
I got to the office earlier that day,________ the 7:30 train from Paddington.
| A．caught | B．to have caught |
| C．to catch | D．having caught |
The manager _______ his workers how to improve the program since 9 am.
| A．has told |
| B．is telling |
| C．has been telling |
| D．will have told |