At the party, John made up a joke, people burst out laughing.
| A．on which | B．by which | C．at which | D．from which |
13 ._______, he is famous for writing blogs.
| A． As he is a teacher | B． A teacher as he is |
| C． A teacher although he is | D． teacher as he is |
12. To my surprise, some of my students_____ stay up to study for the coming examination
| A．may | B．must | C．can | D．Should |
11. It is natural that____student doesn't know some answers to____questions raised by their teachers.
| A．a;a | B．a;the | C．the;a | D．the; the |
10. - Can you show me your headmaster's office?
-_____But I don't know if he is in at the moment.
A. Go ahead B. You're welcome c. Of course not D. Sure
9. After playing basketball for two hours. he returned home.
| A． tiredly and thirsty | B． tired and thirstily |
| C． tiredly and thirstily | D． tired and thirsty |