The problem is difficult few students can work it out.
The new bridge in Wenchuan ____ last month. Now it’s easy to go to the city center.
---She didn’t come to school yesterday, did she ? --- ______. Though she was not feeling very well.
We have two rooms to live in, but I can't decide_________.
More than twenty_____students are having an important exam at the moment.
---Could you tell us __________ ?---About two weeks.