问题
选择题
Everyone had a form in his hand, but no one knew which office____．
A．to send it to
B．to sent it
C．to be sent to
D．to have it sent
答案
答案：A
考查定语从句。句意：没有人知道把它寄到哪个办公室。句子可还原：不是定语从句时应该是to send it to that office room，要换成定语从句office room 作为先行词提前，并把that 换成 which修饰office。