问题

The life of a high school student is usually active, exciting and full of fun, but it ______ be stressful sometimes.

A:must
B:can
C:need
D:should

正确答案是：

同类题型

She was scared ___________ the yard because she was scared _________ by the big dog ___________ at the gate.

What ____ news!–Yes, all of the children were ____.

Mrs Green has ____daughters,and mary is her_____daughter.

The doctor advised Vera strongly that she should takea holiday, but　　didn’t help.

“Did you have breakfast this morning?—— “_____.”