考试时面对并集中注意于试卷所得到的意识，即（）
A、半意识
B、前意识
C、边缘意识
D、焦点意识
参考答案：D
Leaves are found on all kinds of trees, but they differ great__ size and shape.
A. on
B. from
C. by
D. in
My friends and I like science fictions（科幻电影） ____ they are true. [ ]
A. or
B. but
C. and
D. because
