They live in a beautiful village, with many trees and flowers _______ it.
| A．surrounded | B．surrounds | C．surrounding | D．to surround |
______ you look at it, the fast, exciting pace of life in New York city is fascinating and will continue to fascinate more and more people.
| A．How | B．What | C．However | D．whatever |
______ reduce pollution，the government has made a policy to restrict the use of plastic bags in some areas．
| A．In order that | B．So as to | C．So that | D．In order to |
The boy always spent the whole day ______ in the room reading English during the holiday.
| A．locking | B．having locked | C．being locked | D．locked |
Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.
| A．before | B．once | C．until | D．unless |
The monument was built in honor of the explorer who was believed _____ the river.
| A．to discover | B．to have been discovered |
| C．to have discovered | D．having been discovered |