[课 下 作 业]
Ⅰ.单项填空
1．Ladies and gentlemen，please remain ________ until the plane has come to a complete stop.
A．seated B．seating C．to seat D．seat
答案 A [在作remain的表语时，要用动词－ed形式表示状态。]
2．It is important to remember that success ________ a sum of small efforts made each day and often ________ years to achieve.
A．is；takes B．are；takes
C．are；take D．is；take
答案 A [句意：重要的是要记住，成功是每天所做的一些小小的努力的总和，它常常需要
