34. Scientists generally agree that Earth’s climate will warm up over the next 50 to 100 years_________ it has warmed in the 20,000 years since Ice Age.
It isn't so much whether he works hard; the question is whether he works _____.
___ by the beauty of nature, the girl from London decided to spend another two days on the farm.
The house _________ now used to be a storeroom.
The boy kept his mother for more chocolate,and finally his mother .
____ a computer works is a question ___ not everyone cad answer quickly.