i have ____(have) art on monday.

问题描述:

i have ____(have) art on monday.

had

had,后面的on monday可以看出所说的对现在产生影响。

had 我星期一已经上过美术课了.
原因很简单,已经有了一个have,句子只能用完成时的形式
have的完成时形式就是had