_______ a small number of Australians are bitten by spiders each year, most recover without any medical treatment.
69. With the guide leading the way, the visitors were able to travel through the forest not by air but _____ foot.
68. When the boy playing by the river fell into the river, I was out of the room _______.
67. The Prime Minister was more fit __________ his office than anyone else.
66. When the good news that our football team won the championship, the hall was at once _______ great joy.
65. Two dogs ______ a bone, and a third runs away with it.