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Please help me on the following questions? Are they singulars or plurals?

5 minutes is / are left for you.

5 minutes is / are too long.

5 dollars is / are not enough.

5 dollars is / are very cheap.

5 liters is / are not enough.

5 liters of wine is / are not enough.

5 kilograms of apples is / are not enough.

One more question, which of the following are correct?

a Malaysia passport or a Malaysian passport

a China passport or a Chinese passport

a Singapore Embassy or a Singaporean Embassy
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These are OK:

5 minutes is / are left to you.
5 minutes is too long.

5 dollars is not enough.
5 dollars is very cheap.

5 liters is / are not enough.
5 liters of wine is not enough.
5 kilograms of apples is not enough.

a Malaysia passport or a Malaysian passport
a China passport or a Chinese passport
a Singapore Embassy or a Singaporean Embassy
Comments  

5 minutes "is" not are it is like a collective noun

Malaysian passport is correct

Mahesh lecturer English