When he reflected on his failure in the interview, he found that he _____ some inappropriate comments regarding the topic mentioned.
| A．could have made | B．should have made |
| C．must have made | D．would have made |
Out ______ when the bell rang.
| A．rush the children | B．rushed the children |
| C．were rushing the children | D．the children rushed |
When he was a child, he ______ watch TV whenever he wanted to.
| A．should | B．could | C．must | D．need |
Professor John will give us a lecture on how to learn English, but when and where _____ yet.
| A．hasn’t been decided | B．haven’t been decided |
| C．isn’t decided | D．aren’t decided |
Having taken our seats, _______.
| A．the professor began the lecture |
| B．the lecture began in no time |
| C．we were attracted by the lecture immediately |
| D．the bell announced the beginning of the lecture |
Do you think the reason _______ he gave is believable?
| A．when | B．why | C．what | D．which |