The whole class applauded wildly at the end of the speech, ______ greatly encouraged Bob.
| A．what | B．where | C．which | D．when |
It was because his father was ill _____ he did not go to work. 
| A．so | B．that | C．what | D．why |
_____ is no doubt _____ he will be successful someday. 
| A．There; whether | B．There; that | C．It; whether | D．It; that |
Only when I left my parents for Italy ________ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
—I’m sorry. I ___________ at you yesterday.
— Forget it. I was also a bit out of control myself then.
| A．shouldn’t shout | B．mustn’t shout |
| C．shouldn’t have shouted | D．mustn’t have shouted |
The medicine will make you sleepy. You _______until this afternoon. 
| A．would better not drive | B．would better not to drive |
| C．had better not drive | D．had better not to drive |