It has to be
必须───must;需───need
Managers must appraise all staff.───经理必须对全体员工作出评价。
I must think over this, I have known for years that it was in the cards.───我得仔细考虑考虑,许多年来, 我就知道这是可能的.
We must look beyond for signs of change.───我们应该把目光放远,看到变化的迹象.
I must ask you to tone down your remarks; they are giving offence to some of our visitors.───我们必须要求你说话语气和缓一些, 因为你的话得罪了一些客人.
Hospital operating instruments must be sanitary.───医院的手术器械必须是消过毒的.
A dancer must throw herself heart and soul into every performance.───舞蹈演员对每一场演出都必须尽心尽力.
We must draw a clear distinction between ourselves and the enemy.───我们必须分清敌我.
We are in the same boat; we must help each other.───我们既然同舟, 就要共济.
We must recognize that we have been defeated.
The fish is rotten; you must not eat it.
We must be consistent in applying the rules.
Sorry, I must have dialled the wrong number.
Desperate diseases must have desperate cures.