所谓凸图形，就是把一个多边形任意一边向两方无限延长成为一条直线，如果多边形的其他各边均在此直

A．reach

B．make

C．end

D．fulfill

You can do well in one writing task to get a good score.

A.对

B.错

She could have done just as well as you, ______ the chance.

A．given

B．to give

C．giving

D．give

I () don't understand. Could you say it again？

A: still

B: yet

C: as well

— __________

— You might as well write a thanks-note.

A: How do you like the rewards？

B; What do you do with the rewards？

C; Could you suggest some ways of the rewards？

A、help students get more concentrated on the key points

B、help students know the goal or the task to fulfill

C、be realized by asking students “Are you clear？” “Are you ready？”

D、only be done orally rather than in a written form

If you had come earlier, you _______ him.

A、could meet

B、might have met

C、might meet

D、might as well meet

When you make a _______, you should always try to fulfill it.

A) abuse

B) bond

C) estimate

D) pledge