We can’t figure out ______ quite a number of insects and birds are dying out.
“_________ break the law should be punished,” the judge shouted.
—Which side can I sit on the boat?—If you sit still,you can sit on ________.
He won’t want to eat it unless he’s really hungry,in _________ case he’ll eat almost anything.
The weather turned out to be very good,________ was more than we could expect.
The traffic accident wouldn’t have happened yesterday,but the driver _________ really careless.