—Sorry for the delay.I got lost in the mountain.—That's OK.You're safe and that's what________.
I smell something ________ in the kitchen.Can I call you back in a minute?
I thought the girl nice,pretty and honest ________ I met her.
Nowadays,scientists are working hard to find a best way of treating addictions ________ drugs.
It was so ________ having to sing in public.
—Did you look up the time of trains to Shanghai? —Yes,the early train is ________ to leave at 5:30 am.