- 试题详情及答案解析
- You never know how much difficulty we had the problem. Luckily, we managed to solve it with Mrs Wu’s help.
| A．working out | B．work out |
| C．worked out | D．to work out |
- 答案：D
- 试题分析：句意：你不知道为了解决这个问题我们有多少困难。幸运的是，在吴老师的帮助下我们设法解决了它。To do表示目的结合。句意，故选D
考点：考查非谓语动词的用法。