主语从句、表语从句巩固训练题1. It has been proved _ eating vegetables in childhood helps to protect you against serious illnesses in later life.A. ifB. becauseC. whenD. that2. The last time we had great fun was _ we were visiting the Water Park.A. whereB. thatC. whenD. why3. _ matters most in learning English is enough practice.A. WhatB. WhyC. WhereD.Which4. The traditional view is _ we sleep because our brain is “programmed” to make use do so.A
