It’s always difficult being in a foreign country , ____ when you can’t speak the local language .
--Why is the road so crowded? --The two underground lines ________.
--If you are admitted to a key university, ________ as a prize? --I’m looking forward to being paid for a journey to Tibet with my friends.
When you finish reading the book, you will have________better understanding of ______life.
--Alvin, are you coming with us? --I'd love to, but something unexpected ________.
Armed with the information you have gathered, you can ________ preparing your business plan.