___ difficult and challenging thetask may be, we must finish it on time, because there is a possibility _________we’llbe fired if we can’t fulfill the task on time．

If I take this medicine twice a day, it should _____my cold.

it’s already 6 o’clock. I have to be off foran appointment. –OK. ________.

Excuse me, are these books____ – No, they are classmate’s.

5. It’s suniversities in our province.