New technology __________ to stop the students from cheating in the exam last year.A. used B. is used C. was used
The same information ______ read or ______on the website.
Now things made by machine are cheaper than those made _____.
My cousin told me that he could eat three big apples _____.
You will realize what I have done for you _____.
As teenagers, we should study hard _____surf the Internet all day.