There are many kinds _____, but I don’t know which to buy.
Like some of my classmates,I cannot live up to my teachers' expectations;________,I let them down.
We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
Equipped with modern facilities,today's hospitals are quite different from __________ of the past.
—Serina has been watching the TV series the whole night.— ________.
The reporters of all the leading newspapers ________ the trade talks between China and the United States.