According to scientists, our mental abilities begin to____ from the age of 27 after reaching the highest level at 22.
| A．differ | B．shrink | C．fail | D．decline |
If it _______ next week , the crops would be saved.
| A．rains | B．will rains | C．would rain | D．should rain |
If he _______ tomorrow, he would find Mr Wang in the office.
| A．comes | B．will come | C．should come | D．come |
If I _____ you, I’d join the army.
| A．am | B．was | C．were | D．would be |
If there were no subjunctive mood, English _________ much easier.
| A．will be | B．would have been |
| C．could have been | D．would be |
The wind, together with rain and fog, _____ making sailing difficult.
A. have been B. was
C. / D/ are