People _________ rivers for transportation since the beginning of history.
#36687
A
used
B
have used
C
use
D
had used
推荐题目
---There ______ a basketball match on TV this evening.--- Oh, that sounds great!
#39319
A
are going to be
B
is going to have
C
will have
D
will be
—It’s dangerous to swim here. Look at the sign!—Oh, I _______ it.
#36498
A
didn’t notice
B
don’t notice
C
hadn’t notice
D
haven’t notice