----How about the pollution in the countryside?

--- Luckily, it's not as serious as _______ in the big cities.

A. that              B. it             C. one               D. Those

---Someone is knocking at the door. Who may it be?

---It ______ be Tom. He is still in the school.

A. can’t              B. mustn’t

C. couldn’t          D. may not

Lucy had few close friends. So she didn’t know ________ about the trouble.

A. who to talk         B. who to talk to

C. who to say         D. what to talk

Her singing lessons           her five hours a week．

A．take       B．spend      C．cost      D．Pay

He can’t state clearly how long he has ­­­­­­­­­___________ the bicycle?

A. keep        B. buy      C. bought       D. Had

----How can I improve(提高) my listening skills?

-----_______________more.

A. Listen        B. Listening

C. To listen   D. By listening

--My aunt ______________ Singapore for a holiday.

---It’s a beautiful country. I ___________there twice.

A. has gone to; have gone

B. has gone to; have been

C . has gone to; have been to

D. has been to; have been

Look! __________ high speed the roller coaster is __________.

A. How; moving    B. What; moving

C. How; moving at    D. What; moving at

What will the computer ______ in the future?

A. looks like           B. look

C. be looked like     D. be like

Father put the ladder(梯子)_________ the tree to pick the apples for me.

A. against       B. on         C. above        D. Over