________ my surprise, ________ I could have a word with him, he left.
| A．In; before | B．To; before | C．In; when | D．To; since |
If we want ______much cleaner world, we should reduce _______ emission of carbon dioxide.
| A．a; a | B．a; / | C．a; the | D．the; / |
This morning my mother told me _____ she would attend a wedding party _____ she wouldn’t come back home for lunch.
| A．that; and that | B．that; and | C．/; and | D．/; / |
It is the test system, _____ the teachers, that is to blame for the heavy burden（负担）
of middle school students nowadays.
| A．other than | B．or rather | C．rather than | D．more than |
Lucy was so excited _______she received an invitation from her friend to visit Beijing.
| A．where | B．that | C．why | D．when |
___ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.
| A．Surrounding | B．Surround | C．Surrounded | D．Having surrounded |