1£®The famous tower£¬dating(date) back to the tenth century£¬stands on the top of the mount for at least one thousand years.

2£®To_finish(finish) the project in time£¬the staff were working at weekends.

3£®The young man fixed his eyes on the girl so that her face turned red with shyness.

4£®Try out the new cellphone and give me your suggestion.

5£®Even though it is spring£¬you'd better leave the windows closed(close)£®