Subject - verb agreement

Front

Our grandfather____ as an engineer for 30 years before retiring in 1980.

Back

had been working

Front

Lan has learnt English since she ____ a small girl.

Back

was

Front

She won’t get married until she _____ 25 years old.

Back

is

Front

Alice _____ for Washington after her exam.

Back

left

Front

Last week, my professor promised he _________ today.

Back

would come

Front

David! I think someone _________ at the door!

Back

is knocking

Front

A thief broke into Harry’s flat and _________ his TV.

Back

stole

Front

Miss White------------ her parents is going to visit the Great Wall.

Back

as well as

Front

Mary is one of the girls who often late for school.

Back

are

Front

Two hours -------------- not long enough for this rest.

Back

is