Many rules in English are ______, and large numbers of students feel ______ them.
| A．confused; puzzled with | B．confusing; puzzled about |
| C．confused; puzzling with | D．confusing; puzzling about |
【2015·重庆】If you miss this chance, it may be years ____ you get another one.
| A．as | B．before | C．since | D．after |
【2015·北京】_____the damage is done, it will take many years for the farmland to recover.
| A．Until | B．Unless | C．Once | D．Although |
【2015·北京】You won’t find paper cutting difficult _____you keep practicing it.
| A．even if | B．as long as | C．as if | D．ever since |
【2015·北京】He is a shy man,___he is not afraid of anything or anyone.
| A．so | B．but | C．or | D．as |
【2015·湖南】Video games can be a poor influence if ________ in the wrong hands.
| A．to leave | B．leaving | C．leave | D．left |