With so many problems____ , the newly-elected president had a hard time.
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 kepthis mother for more chocolate,and finally his mother.
____ a computer works is a question ___ not everyone cad answer quickly.