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. if B. because C. when D. that
2. The last time we had great fun was ________ we were visiting the Water Park.
A. where B. how C. when D. why
3. ________ matters most in learning English is enough practice.
A. What B. Why C. Where D. Which
4. The traditional view is ______ we sleep because our brain is “programmed” to make use do so.
A. when B. why C. whether D. that
