ls your school far from here –Not very far. It’s about twenty____ walk.

I think ____necessary for us _____the birds.

31 —How long_________each other before they_________married?—For about a year

Measures have been taken to prevent the accidents, but much _____ for more improvement

The boss took no notice of the suggestiongiven by the clerk that the new technology _____ the problems on conveying theproducts.