The best gift she has ever received is a pet dog.(对a pet dog画线提问)

问题描述:

The best gift she has ever received is a pet dog.(对a pet dog画线提问)

What is the best gift which she has ever received?

What is the best gift she has ever received?

What is the best gift that she has ever received?
她收过最好的礼物是什么?
句中有best*修饰时,连接词要用that.