He realized his mistakes and took action to reduce the loss _______ it was too late.
| A．until | B．when | C．before | D．as |
Mr. Black used to be busy. But now he’s tired and, so he has plenty of time to exercise.
| A．hard | B．calm |
| C．free | D．nervous |
— I know by what time you want the project to be done?
—By the day after tomorrow.you finish it on time?
| A．May; Can | B．Must; Need |
| C．Could; Must | D．Need; Would |
Beijing and Zhangjiakouapplying to host the 2022 Winter Olympic Games in 2013.
| A．begin | B．began |
| C．have begun | D．had begun |
A Bite of China 2 includes eight episodes. Itthe stories of more than 150 people t and over 300 types of food.
| A．finds | B．proves |
| C．covers | D．imagines |
— A person’s life is like a roadlots of difficulties.
—Yes, so we need positive energy.
| A．by | B．with |
| C．along | D．during |