_____ occurred to me that the murder happened ____ a rainy day.
| A．What; in | B．What; on | C．It; in | D．It; on |
—When are the traffic police strong? _---When they ___ up cars with one hand.
| A．put | B．hold | C．pick | D．lift |
When we ___ a foreign language, we’d respect its ____, or we can’t really learn it well.
| A．speak; idioms | B．study; ways | C．learn; customs | D．master; manners |
. Some animals are in danger, and the scientists are doing ___ they can ___ them.
| A．that; to save | B．whatever; to save | C．what; save | D．the thing; save |
. The Olympic Games in the year 2008___ in Beijing of China, which known to us all.
| A．is to hold; is | B．is to be held; was | C．are to hold; is | D．are to be held; is |
. If law and order _____, neither the citizen nor his family is safe.
| A．are not preserved | B．is not preserved |
| C．were not preserved | D．have not been preserved |