Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.

The medicine works more effectively ______ you drinksome hot water after taking it.

下列词语中加横线字的读音完全正确的一项是（ ）

I’m going to the States?–How long ________ you________ in the States?

If by any chance somebody comes to see me, ask them to leave a