________ is surprising to us is that Tom, for _______ English was once boring, can speak English fluently as though he were a native speaker.

A．As; whom         B．What; whose       C．It; whose          D．What; whom

Had the boy worked harder, he ______ the exam.

A．must have got through                   B．could get through

C．ought to get through                     D．would have got through

The “Warning” reads: “Under no circumstances _____ be kept near fire!”

A．the chemical should                     B．the chemical shouldn’t

C．should the chemical                     D．should the chemical not

——The weather is too cold ____ March this year.

——It was still ____ when I came here years ago.

A．for; colder        B．in; cold           C．in; hot            D．for; hotter

     the sentence , so he asked the teacher to explain it again.

A．Not having understood                   B．As he didn’t understand

C．Having not understood                   D．He didn’t understand

All of the things there are inexpensive, with prices ________ from about $1 to $10.

A．ranging           B．changing          C．distinguishing      D．differing

---You  aren’t  looking  well. Anything the matter?

---I’ve  been  surfing the net too long. I’m a bit tired.I can hold on,____.

A．though           B．yet               C．besides           D．therefore

---I called you last night, but nobody answered.

---Oh, I usually___off my cellphone by 9:00 p.m.

A．switched          B．have switched      C．switch            D．had switched

Why! I have nothing to confess._____ you want me to say?

A．What is it that      B．What it is that       C．How is it that       D．How it is that

After ___ more chatter, the lady returned home.

A．a good deal of      B．a lot of            C．a good deal        D．a good many