It is uncertain ___________ side effect the medicine will bring about,although about two thousand patients have taken it.
Tour guides for groups of over ten must be booked ______.
______ by the beauty of nature, the girl from London decided to spend another two days on the farm.
Everything ______ life in the spring with the warm weather and long days.
More and more people choose to shop in a supermarket as it offers a great ______ of goods.
The person who was taking photos asked the family to sit ______ and listen ______ to his order.