21st Century is ________ a newspaper. It helps us to improve our English a lot.
--Let’s go for a walk in the garden. --_______ , but I need to do the washing-up first.
Don’t leave the water ______ while you brush your teeth.
Our class teacher is still on ______ holiday, so our monitor will be in ______ charge of the meeting today.
—How did you find your visit to Qingdao, Joanna? —_____________.
One side of the board should be painted yellow, and _______ white.