Experts believe that land that is becoming deserts ________ the size of Australia, Russia and the United States put together
| A．is equal | B．equals | C．is equalled | D．is equalled to |
When the peace talks _______, they realized that there would be a war between the two countries.
| A．broke out | B．broke up | C．broke away | D．broke down |
---When will your new book come out?
---It _____ be out in a month at most.
| A．should | B．must | C．can | D．might |
I’m afraid that the thread will break _____ it’s the weakest.
| A．at which | B．which | C．that | D．where |
---We are late because we took _______ wrong road.
---You should be careful ______ next time.
| A．the…the | B．a…the | C．the…/ | D．/…/ |
It’s important to give her an emergency phone number ______ the children get hurt or sick.
| A．unless | B．in case | C．even though | D．as long as |