免疫防龋中，抗体到达釉质表面可能性最大的途径是A．血清→牙髓→釉质表面B．血清→唾液→釉质表面C．血

If he my advice, he wouldn't have lost his job.

A. followed

B. should follow

C. had followed

D. would follow

A should

B must

C wouldn’t

D can’t

He was quite regretted and he __________ wished he the chance.

[A] shouldn't lost

[B] didn't lose

[C] hadn't lost

[D] wouldn't lose

His father wouldn't give him any money, and ______ lend him any.

A．or he would

B．nor he would

C．nor would he

D．or would he

A．should

B．must

C．wouldn’t

D．can’t

He might have lost his daughter ______ the timely arrival of the policemen.

A．but for

B．except for

C．besides

D．except

He might have lost his daughter ______ the timely arrival of the policemen.

A．but for

B．except for

C．besides

D．except

A．should

B．must

C．wouldn’t

D．can’t

He was in poverty at the time, he wouldn’t have accepted the money.()

A. However

B. Therefore

C. Otherwise

D. Then