掌握了GRE閱讀裡的長難句，到了實戰演習的.時候了。GRE閱讀練習幫助GRE考生循序漸進地進行復習和總結。希望GRE考生在進行GRE閱讀練習時，也按著考試時候的時間規定自己的練習，這樣才能有效果。
On each day of the Monday through Friday workweek, exactly two of three employeesGeorge, Hilda, and Irenemust remain on duty in the office to answer tele-phones during the noon to 1 p.m. lunch break. In the scheduling of telephone duty the following constraints must be met：
Hilda and Irene have telephone duty together on Tuesday.
George and Hilda have telephone duty together onThursday.
No one can have telephone duty on more than four of the five days of the week.
h of the following can be the weeks telephone duty schedule?
Monday Tuesday Wednesday Thursday Friday
George George Hilda George Hilda Hilda Irene Irene Hilda Irene
George Hilda George Hilda George Hilda Irene Hilda Irene Irene
George Hilda George George George Irene Irene Hilda Hilda Hilda
Hilda Hilda George George Hilda Irene Irene Hilda Hilda Irene
Hilda Hilda George George George Irene Irene Hilda Irene Irene
Hilda has telephone duty for exactly two days of the week, which of the following must be true?
