All contributions for the poor in Mu Cang Chai must be received _________ 1st August.

Câu hỏi:

 All contributions for the poor in Mu Cang Chai must be received _________ 1^st August.

• 
  A.
  in
• 
  B.
  at
• 
  C.
  with
• 
  D.
  by