A recent research shows that there _____ volcanic activities on the moon and Mars. However, they no longer exist now.
| A．had been | B．has been | C．were | D．would be |
——Can I speak to Mr Wang？ ——Sorry， he' s out. Can I _____ a message？
| A．leave | B．take | C．ask for | D．Want |
——Have you _____ the invitation to the party？ ——Yes， I have. And I've ______ it.
| A．accepted， received | B．received， accepted |
| C．received， received | D．accepted， accepted |
——Could I speak to Mr Brown？ —— ______ ， I'1l go and see if he is in.
| A．Who are you | B．He isn't here | C．I'm sorry | D．Hold on， please |
Your English teacher looks very young； He _____ be over 30.
| A．mustn't | B．can't | C．won' t | D．may not |
——Need I clean the room now？
——Yes， you _____ ， but you ______ ask someone to help you.
| A．need， need | B．must， can | C．need， can | D．must， need |