We aren’t sure of the weather. We _______ sightseeingunless it_________ tomorrow.

One can not do _______ small talk well for ______ lackof confidence.

How wonderfully you are playing the piano! do you practice it a week —Twice. Practice makes perfect.

(2013·山东济宁模拟)It is by no means clear ________ the president can do something to end the strike

Could you turn the TV down a little bit—___．Is it disturbing you