If Newton lived today, he would be surprised by what _______ in science and technology.
#103519
A
had discovered
B
had been discovered
C
has discovered
D
has been discovered
推荐题目
Our food supply _____. We’d better get some in case there’s ____ left.
#101949
A
is running out, none
B
has run out of, none
C
is using up, nothing
D
has used up, nothing
— Isn’t it hard to drive downtown to work? —Yeah, that’s why I ______ to work by train.
#101418
A
have gone
B
have been going
C
was going
D
will have gone
The manager was concerned to hear that two of his trusted workers _____.
#101325
A
are leaving
B
have left
C
were leaving
D
will leave
—Does Li Ping serve in the army?—No, but he ________ in the army for five years.
#104477
A
served
B
has served
C
is serving
D
would serve