He should have been warned of the danger—________，but he wouldn’t listen to me

The boy is _______ my sister, so he sits infront of her.

The research mainly deals with the difficulty thestudents have ______ their attention pm their study all the time.

How_______ the medicine tastes!—Yes. But the medicine will really work soon after you take it.

Would you like to come to my party this afternoon—Yes , I’d like to,but my mother is ill in ____ hospital . I will go to _____ hospital to see her.