23. We went into a hall, on_____walls hung a few pictures of some famous scientists.
Not only ________snacks and drinks, but they also brought cards forentertainment when they had a picnic in the forest.
This is the only one of the best films _______ to teach kids the first aid this year.
Lawrence Craven is the author of several published reports, one of _____ introduced the idea _____ aspirin could reduce the risk of heart attacks.
Have you got any books on psychology on the shelves of your private library? I’d like to borrow _______.
It is spring now. The flowers sweet in the botanic garden attract the visitors to the beauty of nature.