A．At all the entrances.B．At some entrances.C．At all the exists.D．At some exists.
At all the entrances.
B. At some entrances.
C. At all the exists.
D. At some exists.
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A．The computer class will be held tomorrow morning.B．She will give the man the class s
A. The computer class will be held tomorrow morning.
B. She will give the man the class schedule in the afternoon.
C. She can't give the man the information he wants today.
D. She doesn't know how to get the class schedule.
A．On the walls of caves.B．On a heavy clay tablet.C．On woods.D．On cloth.
A. On the walls of caves.
B. On a heavy clay tablet.
C. On woods.
D. On cloth.
A．He knows less about concepts of engineering.B．He can't explain some concepts of engi
A. He knows less about concepts of engineering.
B. He can't explain some concepts of engineering.
C. He gives talks to high school students regularly.
D. He doesn't want the woman to postpone the talk.
A．P，Q:-RB．P:-Q，RC．P:-～Q，RD．P，Q:-
A. P，Q:-R
B. P:-Q，R
C. P:-～Q，R
D. P，Q:-
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