It was when I arrived home _____ I realized I had left my bag in the library.
| A．what | B．because | C．that | D．until |
The police recommended parents __________their children under 12 to ride to school for safety.
| A．not allow | B．do not allow |
| C．mustn’t allow | D．couldn’t allow |
----I wonder why Jane looks worried today.
----I’m not sure, but she a small accident driving here.
| A．could have | B．might have |
| C．might have had | D．should have had |
We tried ______ to persuade him to stay home, but at last, he went to the construction site despite his bad illness.
| A．in case | B．in vain |
| C．in fact | D．in addition |
Never before ____ in greater need of modern public transport than it is today.
| A．has this city been | B．this city has been |
| C．was this city | D．this city was |
Clearly and thoughtfully________, the book inspires confidence in students who wish to seek their own answers.
| A．writing | B．to write |
| C．written | D．being written |