I really don’t know how to thank you , but for your help, I ______ my lost necklace．
| A．couldn’t have found | B．mustn’t have found |
| C．couldn’t find | D．wouldn’t find |
It was __________ back home after the experiment .
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |
She didn’t come to the party last Sunday. __________, she must have made the party more exciting.
| A．If she came | B．Would she come | C．Had she come | D．Did she come |
— Are you going there with us?
— If Mary wants to go, __________.
| A．I also go | B．so do I | C．so I will | D．so will I |
The teacher told us to remain silent unless _____.
| A．to be asked | B．being asked | C．asked | D．you asked |
— Do you think it is going to rain over the weekend?
— __________.
| A．I don’t believe | B．I don’t believe it | C．I believe not so | D．I believe not |