Bears often hide themselves in places ________ can’t be found by hunters.
| A．in which | B．where | C．that | D．不填 |
Great changes ______ in China in the past 20 years.
| A．took place | B．have taken place |
| C．were taken place | D．have been taken place |
His illness his absence.
| A．explained | B．because of |
| C．accounted for | D．is responsible for |
When the man was trying to break into the bank, he was caught by the police.
| A．in a spot | B．on the spot |
| C．off the spot | D．to the spot |
My best friend who _______ a rich man two years ago has a baby now.
| A．married with | B．was married |
| C．married | D．married to |
It snowed heavily; ______, lots of flights have been put off until further notice.
| A．or else | B．as a result |
| C．as well | D．as a matter of fact |