____ he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |
My father ______ me against getting up late again，or he would punish me.
| A．cautioned | B．accused |
| C．counted | D．advanced |
My parents will not ______ my birthday party if I don't do well in my next test.
| A．agree with | B．allow for |
| C．approve of | D．object to |
He ______ have sent the e-mail at an earlier time， but there was something wrong with the network.
| A．must | B．should |
| C．could | D．might |
—Can Professor Li be in the laboratory?
—He ______ be； I saw him there half an hour ago.
| A．can | B．must |
| C．might | D．need |
My newly-purchased magazine is nowhere to be found. ______ I have left it on the train?
| A．Could | B．Should |
| C．Must | D．Would |