Our school has a big library .There are about __________ books in it .
The meal mother cooked ______ very delicious.
It’s ____ difficult problem for the twins that ____ of them can work it out .
It was very cold the day before yesterday._______
____ unusual news! All of us are surprised at it .
–Where does the man come from? --I don’t know for certain. Judging by her _________, she may be a Southerner, I guess.