So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ______.
#87593
A
ustn’t be
B
ay not be
C
an’t be
D
on’t be
推荐题目
I asked he ______ too much time watching TV, for he will sit for an exam.
#86749
A
not spend
B
not to spend
C
didn't spend
D
not spending
If penicillin _____________ available, many people ______________ from sickness.
#86943
A
weren’t , would have died
B
shouldn’t be, would die
C
hadn’t been, would have died
D
is, will die
The mayor ordered that the food and tents ________ sent to the people in the earthquake as soon as possible.
#88180
A
were
B
be
C
would be
D
had been
It was John who broke the window. Why are you talking to me as if I _______ it?
#86374
A
had done
B
have done
C
did
D
am doing
He hesitated for a moment before kicking the ball, otherwise he a goal.
#86634
A
had scored
B
scored
C
would score
D
would have scored