He ________ goes to the National Library of China, once a month at most.
Mrs. Black doesn’t believe that her son is able to design a digital camera, ______?
Now that their parents are dead, the poor boy doesn’t know ________ the money they left.
The woman ______ you met at my home was a teacher of English. Which of the following is wrong ?
Do you still consider the child _______ ?
The average price of commercial houses in our city has reduced by _____ 30 percent ,so we can buy one at _____ low price .