单项选择题
The book is a()for students of science.
A.necessary
B.must
C.important
D.useful
点击查看答案&解析
相关考题
-
单项选择题
Not only was she hard-working,()
A.how beautiful she was
B.was she helpful
C.but she was also polite
D.what a beautiful girl -
单项选择题
Nancy hasn't begun working on her Ph. D,()working on her master's.
A.still because she is yet
B.yet as a result she is still
C.yet because she is still
D.still while she is already -
单项选择题
It was not until()that()to prepare his lessons.
A.did his father come in, the boy began
B.did his father come in, did the boy begin
C.his father came in, the boy began
D.his father came in, did the boy begin
