A pair of trousers are needed.
There are a pair of trousers here.
According to me they are fake.
According to us they are fake.
He admits to have made a mistake in his calculations.
I have an advice for you.
They advised to see a doctor if the symptoms persisted.
The expert advised us investing in more sustainable technologies.
The sudden news influenced her deeply, causing her to feel sad.
The cold weather effected my health, and I caught a cold.

 

answers

a pair singular
a pair singular
according to me,us wrong
according to me,us wrong
admit to gerund
advice uncountable
advise gerund
advise sb inf
affect
affected