Hello．This is Leo speaking．Is that John？
Sorry，he isn't in．__________．（ ）
A．Please hold on
B．May I take a message？
C．What are you saying to him？
Is this hat_______________？
No， the red one is_________．（ ）
A．Lucy's； herB．Lucy； her
C．Lucy's； hersD．Lucy； hers
Please remember to _________the electricity and water before you leave the laboratory．（ ）
A．take offB．shut offC．go offD．put off
Li Lei didn't play computer games last weekend．__________，he worked as a volunteer in an old people's home． （ ）
A．InsteadB．CertainlyC．ThoughD．Gradually
You'd better not hang out after school _______telling your parents． They may worry about you．（ ）
A．byB．withC．withoutD．after
What _________unusual school trip we had! I will never forget it．（ ）
A．aB．anC．theD．/