(2012年江西上高月考,29)Nowadays,many people walk to work________ Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
The road becomes so crowded during rush hours, ______ it becomes a very slow route.
-- The classroom looks like a mess! -- Yes, but who left the waste paper ______ around?
-- I think we'll give Bob a ring. -- We ______ . We have been out of touch with him for ages.
Honey, stay outside and ______ a few minutes; then we'll go to church together.
-- Why didn't you go camping with us? -- But I ______ all about it!