Explanation: Some teachers always set difficult and strange questions to give students a hard time. There are also such people in life, who take delight in making things difficult for others.

Example

Ex1.：Our boss always make things difficult for me. My English is not so good, but he still made me interpret for the meeting.

Ex2.：To work in China is the tough challenge he set for himself. He didn't know a single word of Chinese when he just came. But now he is able to work with Chinese.

Explanation: When said two or several people are wearing "one pair of pants", it means they're collaborating with each other.

Example

例：

Ex.：

A：Why I'm so unlucky, the manager always make things difficult for me.

B：You can talk to the chairman of the board.

A：What good can that do? They're on the same side.