—It's a lovely day, isn’t it？
—_____ ？
| A．Yes, it is | B．Yes, is it | C．Yes, isn’t it | D．No, isn’t it |
Do you know the reason ____ she has changed her mind?
| A．why | B．which | C．for that | D．of which |
He failed in the exam, ____ proves that he wasn’t working hard enough.
| A．which | B．what | C．it | D．that |
During the week ____ he tried to collect materials for his article.
| A．following | B．followed | C．to follow | D．that followed |
____ was expected, he succeeded in the exam.
| A．It | B．Which | C．As | D．That |
He studied hard and later became a well-known writer, ____ his father expected.
| A．that was what | B．what was that |
| C．and which was | D．which was what |