This is the first study to compare the effects of the new drug with its side effects.
| A．beneficial | B．specific | C．powerful | D．potential |
You _______ have washed the dishes. I would’ve put them in the dishwasher.
| A．shouldn’t | B．wouldn’t | C．couldn’t | D．needn’t |
After the summer camp, I realized I wanted to take a route _______
_ I could use English all the time.
| A．that | B．which | C．/ | D．where |
Was it midnight ________ the fire broke out?
| A．when | B．that | C．which | D．at which |
— ________ he ________ anything about this historic site?
— Yes. That’s why he suddenly becomes so obsessed with it.
| A．Has; read | B．Does; read | C．Did; read | D．Had; read |
You should never base anything on a theory that _________ impractical in practice.
| A．is proved | B．prove | C．proves | D．proved |