----I’ll go to Beijing for a holiday next Monday.

----- Great!  _________________!

A．Good luck

B．Best wishes

C．Glad to see you again

D．Have a good time

铸钢件冒口的模数必须（）铸件的模数，才能保证有效补缩。

A.大于

B.小于

C.等于

D.大于或小于