When her mother came home yesterday, it was___dark.
At times the balance in nature is ______,resulting in a number of possibly unforeseen effects.
Generous public funding of basic science would______a good many benefits for the country's health,wealth and security.
_____,they set out to break the record for crosschannel swimming.
There is still much to discuss.We shall,______,return to this item at our next meeting.
—What made you so delighted at Christmas?—______.