With sufficient scientific information a manned trip to Mars should be _____.
#20853
A
obtainable
B
potential
C
considerable
D
feasible
推荐题目
The writing was not _____, so we could not read it at all.
#18276
A
distinct
B
handy
C
sharp
D
abrupt
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