She described the pain of a broken heart as tears.

He performed a circus act on a unicycle.

My grandfather used to be a steam locomotive driver.

He commutes by two-wheeled vehicle.

My new four-wheeled vehicle is very fast.

My new four-wheeled vehicle is very fast.

As the phrase 'If it does not sing, let's wait until the cuckoo sings' suggests, we should wait patiently until the opportunity comes.

He has done everything he can to prepare for the exam, and now he is in a state of 'doing all that is humanly possible and waiting for fate to take its course'.

After we had a big fight, we became a stronger relationship, just like the proverb 'after the rain, the ground hardens'.

With the spirit of preparing before it's too late, he started studying a week before the exam.