Henry killed the dog. I'll ask him why ________.
It’ll be another 50 years _________ China is expected to reach the level of a medium developed country.
What about todays temperature? -- Its the same as, if the weather report is exact as usual, ___ of yesterday.
Most environmental problems exist because adequate measures for preventing them ____in the past.
—Go for a picnic this weekend, OK? —__________. I love getting close to nature.
__________ Tom didn’t pass the exam made his parents very upset.