—I don’t know ______ with this problem. It’s too hard. —You can ask Mr Wang for help.
On March 11, 2011 _____ earthquake hit Japan.
Which of the following is NOT a traffic sign? A B C
He has tried four times, but his teacher wants him to try ______ fifth time. A. the B. a C. /
My brother’s handwriting isn’t so good as ______. A. mine B. my C. me
Great changes ______ in our hometown in the past ten years. A. have taken place B. have been taken place C. were taken place