— _________, this math problem seemed quite simple to me, but when I tried to work it out, I just couldn’t.— There are always things like this, I think.
Does John know any other foreign language ______ English?
Life is just like a journey with ______ unknown destination, during which people can meet with ______ barriers of all kinds.
After that, she knew she could __________ any difficulties by doing what she could to the best of her ability.
The new movie __________ to be one of the biggest money-makers of all time.
None of us had expected the middle-aged engineer died __________ his design uncompleted.