6.You _____ pay too much attention to your reading and listening skill, for they are of great importance.
| A． won’t | B．mustn’t | C． needn’t | D． Cannot |
The boy was in the water and his canoe was_______ away.
| A．running | B．floating. | C．flowing | D．pulling |
The task is hard, ____, the workers managed to finish it in time.
| A．therefore | B．otherwise | C．however | D．yet |
Mrs. Clarke raised the kettle and _______the water over the hand.
| A．spread | B．dropped | C．poured | D．covered |
Our cousin who is attending college in New York phones us every Sunday at six, _________ as clockwork.
| A．usually | B．frequently | C．regularly | D．commonly |
A kind of glass dish that _____ heat is useful.
| A．resists | B．rejects | C．defends | D．keeps |