Only when he started to explain ________ the reason for this.
A. she realized
B. did she realize
C. had she realized
—Does she like singing English songs?
—Yes. She _______ to sing English songs in her room.
| A．often does | B．is often heard |
| C．often hears | D．often heard |
_____ is believed that Bell invented the first telephone in1876.
| A．This | B．That | C．It | D．One |
Yougood grades if youhard.
| A．won’t get; won’t study |
| B．won’t get; don’t study |
| C．don’t get; don’t study |
| D．don’t get; won’t study |
The clothes________in the wardrobe(衣柜). Put them on the bed.
| A．should put | B．should not be put |
| C．should be not putted | D．should putted |
Workers can’t be made ________ for twelve hours a day.
| A．work | B．to work | C．working | D．worked |