As a student, it is your to study hard.
| A．duty | B．mistakes | C．notes | D．challenge |
Tony has rice with hamburgers ________ his lunch.
| A．on | B．for | C．to | D．with |
______Sunday morning Xiaoming gets up_______ half past six.
| A．At；at | B．On；on | C．On；at | D．In；at |
Dinner usually________ at six o'clock.
A. start B. starts C. to start
They never________ to work in the factory on Sunday.
A. goes B. go C. gos
Betty often buys books_______ Lu Xun.
A. to B. by C. at