The book fair has received a positive ________ from readers.
B
A结果，效果B反应，回答C解决，协议D解决，解答
No sooner had we reached home ________ a violent storm broke out.
It rained hard yesterday, ______ prevented me from going to the park.
Thenewdiscovery_______beofgreatservicetomankind.
Theypreferto_______therestofthemorningwalkinginthegarden.