It is these poisonous products _____ can cause the symptoms of the flu, such as headaches and aching muscles.
| A．who | B．that | C．how | D．what |
He did not regret saying what he did but felt that he it differently.
| A．could express | B．would express |
| C．could have expressed | D．must have expressed |
There was a lot of fun at yesterday’s party. You______come, but why didn’t you?
| A．must have | B．should |
| C．need have | D．ought to have |
The fire spread through the hotel very quickly but everyone______get out.
| A．had to | B．would | C．was able to | D．could |
—Don’t you think it necessary that he ______ to Miami but to New York？
—I agree，but the problem is ______ he has refused to.
| A．will not be sent；that | B．not be sent；that |
| C．should not be sent；what | D．should not send；what |
Thank you for all your hard work last week.I don’t think we ______ it without you.
| A．can manage | B．could have managed |
| C．could managed | D．can have managed |