Though ______, many laws of nature exist.
| A．not having been discovered | B．having not been discovered |
| C．not having discovered | D．having not discovered |
More than 10,000 relics, ____ between 5,000 to 3,000 B.C., ___ at Sanxingdui since it was first discovered.
A. dating back to, was dug up B. dating back to, have been dug up
C. dated back to, has been dug up D. dated back to, were dug up
--- London Bus Service, how can I help you?
--- Hi, I’d like to rent a bus which can ____ 40 people for our trip to Cambridge.
| A．load | B．hold | C．fill | D．support |
Your body language _____ your real emotion.
| A．gave in | B．gave up | C．gave away | D．gave out |
The Roman Empire _____ for several centuries.
| A．exists | B．existed | C．was existed | D．is existing |
With tags(标签) _____ to the luggage, it won’t take long for the passengers to find theirs correctly.
| A．attaching | B．attached | C．to attach | D．attaches |