关于上颌前磨牙髓腔解剖特点，错误的是A．牙根内有1～2个根管B．颊舌径大于远中径C．髓室类似立方形D．

A.due

B.sure

C.early

D.late

听力原文：M: When will the train from Boston arrive？

W: It was scheduled to be here at 9: 15, but now it is expected to be 15 minutes behind schedule.

Q: When is the train expected to arrive now？

(13)

A．At 9:15.

B．At 9:30.

C．At 9:50.

D．At 10:0

听力原文：W: The train was supposed to arrive at 9 o'clock.

M: Nine o' clock ! But it' s already 9:30.

What does the man mean？

A．The train is already late.

B．He' s sorry it' s already 9:30.

C．The train is always late.

D．The train is arriving at 9:30.

What does "the 9:25 train" refer to？

A．The train will leave the station at 9:25.

B．The train will arrive at the station at 9:25.

C．Passengers should board the train at 9:25.

D．Passengers should get off in Oxford at 9:25.

What does "the 9:25 train" refer to？

A．The train will leave the station at 9:25.

B．The train will arrive at the station at 9:25.

C．Passengers should board the train at 9:25.

D．Passengers should get off in Oxford at 9:25.

What does "the 9:25 train" refer to？

A．The train will leave the station at 9:25.

B．The train will arrive at the station at 9:25.

C．Passengers should board the train at 9:25.

D．Passengers should get off in Oxford at 9:25.

What does "the 9:25 train" refer to？

A．The train will leave the station at 9:25.

B．The train will arrive at the station at 9:25.

C．Passengers should board the train at 9:25.

D．Passengers should get off in Oxford at 9:25.

A．The train is always late.

B．She"s sorry it"s already 9: 30.

C．The train is arriving at 9: 30.

D．The train is already late.

A.is due

B.is due to

C.is due for

D.due to