成人本科学位英语单项选择题每日一练(2020.10.03)

单项选择题
Be careful,（）you'll fall down.
A.on the contrary
B.or rather
C.or else
D.as for
单项选择题
The problem（）when the students refused to do their homework.
A.arose
B.aroused
C.rose
D.raised
单项选择题
（）good health, one can achieve anything.
A.Giving
B.Having given
C.Given
D.Having been given
单项选择题
The aircraft vanished without（）
A.trace
B.trouble
C.destination
D.product
单项选择题
Technology is to the development of the modern society a matter of（）importance.
A.depressing
B.compelling
C.suppressing
D.supreme