worries me the way he keeps changing his mind.
| A．This | B．That |
| C．What | D．It |
It was with great joy _______ Tom received the news that his lost son had been found．
| A．because | B．which |
| C．since | D．that |
So sudden ______ that the enemy had no time to escape．
| A．did the attack |
| B．the attack did |
| C．was the attack |
| D．the attack was |
Look out！Don’t get too close to the house ________ roof is under repair．
| A．which | B．whose |
| C．what | D．that |
I have an appointment _______ Dr．Brown，but I need to change it．
| A．to | B．off |
| C．with | D．from |
— I’m sorry．I ________ at you the other day．
— Forget it．I was a bit out of control myself．
| A．shouldn’t shout |
| B．shouldn’t have shouted |
| C．mustn’t shout |
| D．mustn’t have shouted |