Natural disasters occur at ________ times, so it is always difficult to warn people in advance.
#19036
A
random
B
exact
C
flexible
D
absolute
推荐题目
At a very young age, Professor Field used to__________  books on radio. 
#19526
A
devote to translating
B
devote himself to translate
C
be devoted to translate
D
be devoted to translating
Come to pick me up if _______
#18491
A
you are convenient
B
at your convenience
C
it is convenient
D
for convenience
--- What’s the model plane look like? --- Well, the wings of the plane are ______ of its body.
#18191
A
more than the length twice
B
twice more than the length
C
more than twice the length
D
more twice than the length