.
.---Who ________ it be that is knocking at the door?
---It________ be Mother, but I’m not sure.
| A．can; must | B．can; may | C．must; can | D．may; must |
The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent cause a series of explosions of the nuclear reactors in several power stations.
| A．to | B．that | C．as to | D．as that |
She didn’t allow the accident to discourage her. On the contrary, she began to work.
| A．as twice hard | B．twice as hard | C．twice as harder | D．harder twice |
—Betty was feeling pretty blue for a while, but she’s better now.
—
| A．Oh, that’s kind of you. | B．Congratulations. |
| C．Oh, I’m glad to hear that. | D．It’s my pleasure. |
I noticed the puzzled look on his face, I realized that he didn’t understand me.
| A．Although | B．When | C．Unless | D．Until |
Tod thought he waswhen the manager asked him for the advice on the new project.
| A．something | B．anything | C．somebody | D．anybody |