_______, the disease diphtheria would produce a powerful poison that would kill the paient.
| A．If untreated | B．If it untreated | C．To be untreated | D．If being untreated |
The villagers in the mountain have a firm ______ that they will have a good harvest next year.
| A．opinion | B．theory | C．idea | D．belief |
---- Where are you going for the weekend?
---- I haven’t decided yet. I _______ go fishing with my friends.
| A．should | B．might | C．can | D．must |
Two weeks ago, I bought a bicycle. If you live in town, it is often faster than a car and you worry about parking.
| A．must not | B．should not | C．don't have to | D．may not |
I’ll be going to school on foot while my bicycle________.
| A．is being repaired | B．is repaired |
| C．will repaired | D．has been repaired |
---- Don’t worry, Mum. The doctor said it was only the flu.
---- ________! I'll tell Dad there is nothing serious.
| A．What a relief | B．Congratulations |
| C．How surprising | D．I am so sorry |