【C16】______A．dangerousB．undesirableC．safeD．terrible

（1）a＋18=______＋______　　　a×15=______×______（2）m×2.5×0.4=______×（______×______）（3）（a＋b）×C=______×_____

根据运算定律，在横线里填上适当的字母或数．（38＋x）＋42=x＋（______＋______）a－b－c=a－（______＋______）（a＋25）×8=_

－－－ We’ve booked a table. We hope you can join us？－－－ _________________________________A

【C16】______A．a strongB．a mostC．a badD．an exciting

She is ____________ General Manager of___________ big company.A.a,anB.the,aC.a,the

— ___________________— Once or twice a week.A How