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 |
Harry is feeling uncomfortable. He __________ too much at the party last night.
| A．could drink |
| B．should drink |
| C．would have drunk |
| D．must have drunk |
When I was a child, I __________ watch TV whenever I wanted to.
| A．should |
| B．could |
| C．must |
| D．need |
Since nobody gave him any help, he __________ have done the research on his own.
| A．can |
| B．must |
| C．would |
| D．need |
The children __________ lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
| A．must have got |
| B．must get |
| C．should have got |
| D．should get |
-Where did you get this book?
-I picked it up from a second-hand bookshop if you __________ know.
| A．must |
| B．will |
| C．can |
| D．shall |