Mike, why did you make no reply to me when I called your name in the street just now?-Sorry, Tom. I_______ to my mother on the phone.

Don’t lose heart. It won’t be long ___________ you catch up with others.

Some people think that CD-ROMs will soon be _________ books.

Add some sauce _____the fish. [ ]

The boy used to cause a lot of _________/’tr?bl / very much.