The books, ________ the dictionaries, must be put back where they ________.
-- How many people are expected to come to your party tomorrow afternoon?-- I send out thirty invitations but one third _____.
The living room is clean and tidy, with a dining table already ______ for a meal to be cooked.
Life is like riding a bicycle. ______your balance, you must keep moving.
With time going by, we have come to realize that creativity is it takes to keep a nation highly competitive.
A kind-hearted passenger paid for Tim’s ticket, without which he _____ the last train.