问题
完形填空
Every day a number of tourists take pictures in front of the tower, which dates ________ as early as 800 years ago.
答案
from
句意:每天都有许多游客在这座可追溯到800年前的塔前拍照。短语date back to相当于date from,意为“追溯到;始于”。两者通常与过去的时间状语连用,但多用于一般现在时。