The man ______ gave us a talk on science yesterday is a famous scientist.
| A．who | B．whose | C．won | D．Watched |
The World Expo (世博会) ____________ in Shanghai now.
| A．being had | B．is having | C．is holding | D．is being held |
Beijing, the capital of China, is one of __________ cities in the world.
| A．the biggest | B．bigger | C．much bigger | D．big |
How time flies! Three years ____________ really a short time.
| A．is | B．are | C．was | D．were |
I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.
| A．go on | B．give up | C．run away | D．give back |
— How long have you ________?
— For three days.
| A．got a headache | B．fallen ill |
| C．caught a cold | D．had a cough |