____ the working efficiency(工作效率), the boss allows the employees to have a coffee
break.
| A．Improving | B．To improve | C．Having improved | D．Improved |
out of the high school, he had difficulty in finding a job and led a tough life.
| A．Dropped | B．Dropping | C．To drop | D．Being dropped |
I lunch when I learned that former British prime minister Margaret Thatcher had passed away.
| A．ate | B．had eaten | C．was eating | D．were eating |
It was with great joy the couple found their missing son after 18 years.
| A．when | B．that | C．what | D．which |
No driving after drinking is a rule that every driver _______ obey in our country.
| A．will | B．shall | C．may | D．can |
Missing in Thailand, a comedy about two rival Chinese businessmen and a simple-minded pancake maker, box offices records since Dec 12.
| A．is breaking | B．are breaking | C．has broken | D．have broken |