1.   This visits period lasted for half a term, although for some subject departments it was completed during four weeks.

2.   The refeeding periods lasted for eight days.

3.   This symptom free period lasted for several days and even weeks.

4.   Most rehearsal periods last four weeks.

5.   That period could last several months, the officials said.

6.   That period could last several years, she warned.

7.   That period probably will last for another two weeks, when hundreds of companies begin to announce their actual results for the quarter.

8.   The doctor said the recuperation period can last months or even a year or more.

9.   The fruit-bearing period lasted only about three weeks.

10.   The gestation period has lasted years, not months.