---Look, our headmaster is over there, playing basketball with some students of our class. --- Oh, he must be ________ to his students.
#19309
A
possible
B
valuable
C
available
D
accessiblee
推荐题目
_______ in thought, I didn’t notice what was happing.
#18826
A
Having buried
B
Burying
C
Buried
D
To be buried
____________ scientists will be invited to take part in this space flight. 
#19161
A
Two strong young Chinese
B
Two Chinese strong young
C
Chinese two young strong
D
Young strong two Chinese
Be ____ to finish your homework before supper.
#20718
A
shy
B
sure
C
nervous
D
serious