master|masters|master's

经过多年的陪伴，这只忠实的狗总是紧紧跟在它的主人身边。

After years of companionship, the loyal dog always walked closely by its ___master's side.

在这座大宅邸里，管家直接从主人那里接收每日的指令。

In the grand household, the butler received his daily instructions directly from the ___master.

我们应该记住，我们是技术的主人，而不是它的奴仆。

We should remember that we are the ___master of technology, not its servant.

她决定攻读工程学硕士学位。

She decided to study for a ___Master's degree in engineering.

硕士学位可以提升你的职业前景。

A ___Master's degree can enhance your career prospects.

经过多年练习，他掌握了钢琴。

He ___masters the piano after years of practice.