21.We are at your service.Don’t______ to turn to us if you have any further problems .
A beg B. hesitate C. desire D. seek
22. The doctor________at the patient quickly and rang for an ambulance immediately .
A glanced B glared C gazed D. stared
23. Though having lived abroad for years, many Chinese still ______ the traditional customs .
A. perform B possess C. observe D support
24. Local citizens placed flowers at the corner of one street in Hamilton. Canada, _______the Canadian soldier, who was killed by a gunman
A. in favor of B in memory of C. in terms of D. in spite of
