________ people are concerned about now is the Shanghai World Expo, which ________ start on May 1st.
| A．What; is due to | B．Which; is going to |
| C．That; is to | D．What; is about to |
Think hard and you won’t have the puzzle you.
| A．puzzling | B．puzzle | C．to puzzle | D．puzzled |
This sentence is difficult to understand.Can you make of it?
| A．sense | B．knowledge | C．idea | D．understanding |
—Is Paul playing basketball for his school?
—Well,he ,But he has given it up and switched to playing volleyball.
| A．is | B．was | C．has | D．had |
You’d better go there by train.The train ticket isthe airplane ticket.
| A．as cheap three times as | B．as three times cheap as |
| C．three times cheaper than | D．cheaper three times than |
I to go for a walk,but someone called and I couldn’t get away.
| A．was planning | B．planned | C．had planned | D．would plan |