It will______us several years to learn a foreign language well.
Mike was ill yesterday.He had to________ his plan for the holiday.
The number of books in the bookshop is about 10,000 and a number of them ________ about science. is B.was C.are D.Were
--- Do you believe that paper is made ________ wood? —Yes, I do.And you can see that books are made ________ paper.
It was a ________ day and she felt very ________.
When I passed the classroom, I heard a girl ________ in it.