—Whose book is this?—It belongs to________.
-- Our school bus will leave at 8 o'clock tomorrow. Don't be late.-- OK. I will be there ten minutes________.
The rivers will become dirtier and dirtier ______ we take action to protect them.
It is helpful to ________ a good habit of reading in language learning.
-- It will be my turn. I feel a little nervous.--________ You can make it!
-- What was Jim wearing at the party?-- Nothing ________. He was in his usual shirt and jeans.