How long did the concert ______ ?

Theschool_________wemetafamousscientistisnotbig.

The progress he has made in maths is much greater than ______ in English .

--Mike, you’ ve got so many beautiful stamps.

--Yeah. I _________ collect stamps when I was in primary school.

--Look! That man looks like Mr White.

--It _________ be him. Mr White _________America yesterday.