When it comes to the civil war in Syria, the US government’s attitude towards it has experienced a(n)_______ change , which may have a positive effect on Syria present situation.

The doctors the medicines to the people in the flood area. [ ]

Jack wasn’t saying anything，but the teacher smiled at him _______he had done something very clever．[ ]

Don’t worry. We still have __________ time.

are you,my dear— Not so well． I’ve ___ the flu．