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 |
— You don’t look well, Don! You’d better see your doctor.
— I ________, but he said there was nothing wrong.
| A．will | B．would | C．had | D．have |