Exploring ________space is exciting, yet dangerous. There is ________need for both robots and humans for space exploration.
#11641
A
the; a
B
a; a
C
/; a
D
/; the
推荐题目
(2014·石家庄质检)I admire Stephen Hawking greatly，whose________about black holes has a great effect on astronomy.
#10643
A
theory
B
practice
C
way
D
method
To good relationships with your teachers and classmates, you should learn to be on good terms with them.
#13936
A
bring up
B
add up
C
keep up
D
take up
In ____, he began to learn Russian, when he was in ______.
#12067
A
1970; the 50’s
B
the 1970; his 50s
C
the 1970s; his fifties
D
1970s; his fifties
The girl didn’t help you last time. _____ you don’t want to talk to her.
#13441
A
No wonder
B
No doubt
C
Above all
D
After all
We hope your suggestion will ______ solving the problem.
#12009
A
contribute to
B
relate to
C
attend to
D
devote to