The number of the teacher invited _____ twelve, but a number of them ___ late for different reasons.

Would you ___ first aid to him, had it been possible-Yes, but I _____.

The road is always busy. Look out when you walk_______.

Sarah is _______ all kinds of flowers, which is always considered as a regrettable thing by her husband.

19. －How did your interview go?－I couldn’t feel ________ about it! I seemed to find an answer for all of the questions.