Questions 135~138 refer to the following email.
Dear colleagues,

Thank you for the _135__ hard work for the past eleven months. __136__ our appreciation, we are planning a company trip to one of the vacation destination you recommend. Please __137__ the attached questionnaire and submit it by next Wednesday noon. A special staff meeting will be scheduled __138__ next Friday and the results will be announced then.

Best regards,
Gary Morgan
HR Manager
【題組】135.
(A) credit
(B) creditable
(C) incredible
(D) incredibly