短文填空（共7小题，计7分）

用括号内所给动词的适当形式填空，必要时可加助动词或情态动词。

Now more than 20 schools in the northwest of China 小题1: __________ (use) E-textbooks. Some teachers say that they make learning easier and 小题2:__________ (teach) more convenient.

Jing Xuan is excited about lessons like Chinese, English and math. She小题3:__________ (enjoy) the pictures and animations(动画）in the E-textbooks. The children here 小题4:__________ (study) with E-textbooks since last September

With the help of the E-textbooks, some good ideas 小题5: __________ (share) at times. Some parents encourage their children 小题6:__________ (try) the E-textbooks to make learning easier. But others worry about their children’s health.

“You can’t imagine how the growing popularity of E-textbooks is changing the way the students learn! More and more students 小题7: __________ (learn) with E-textbooks in the future. However, there’s still a long way to go.” said the headmaster.

影响脉络膜黑色素瘤预后的主要因素中，不包括（）。

A.肿瘤的体积大小

B.组织细胞类型

C.肿瘤颜色

D.巩膜外有无扩散

E.肿瘤位置