It’s difficult to live in a foreign country, ______ if you can’t understand the language there.

Taiwan is ______ the southeast of China. [ ]

I wonder if you can finish it on your own.—You are wrong. I did it last night _______. [ ]

Have you got any books on English grammar? I want to borrow______.Yes, here you are. But you must return it by Friday.

Do you know ________? – Oh, I know he was born in 1929.