Had you taken it more seriously, you ________ such a silly mistake.
| A．may not make | B．couldn’t make |
| C．mustn’t have made | D．wouldn’t have made |
We have entered into an age ________ dreams have the best chance of coming true.
| A． |
which |
B． |
what |
C． |
when |
D． |
that |
A dog's eating habit requires regular training before it is ___________ established.
| A． |
properly |
B． |
widely |
C． |
originally |
D． |
temporarily |
The workers were not better organized, otherwise they ____________ the task in half the time.
| A． |
accomplished |
B． |
had accomplished |
| C． |
would accomplish |
D． |
would have accomplished |
Tom is so independent that he never asks his parents' opinion _________ he wants their support.
| A． |
since |
B． |
once |
C． |
unless |
D． |
after |
The professor warned the students that on no account _____________ use mobile phones in his class.
| A． |
should they |
B． |
they should |
C． |
dare they |
D． |
they dare |