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)．
Ⅱ.单句改错
1．Bathing in the fog，we couldn't see the mountain clearly.Bathing→Bathed
2．Though he is very rich，he shows little mercy on the poor.on→to
3．You will be paid to write an article for our website recording a situation that you find yourself extremely embarrassed or scared.that→where
4．If he wants to win in the contest，he must take great pain to prepare for it.
pain→pains
5．The classroom looks like a mess，then who left the waste paper lie around？
lie→lying
