Our physics teacher told us that light ________ faster than sound.
I don’t know if Mr Wang ________here tomorrow . If he ______ , please tell me.
______ young man standing there looks strong and healthy; however, as_________ matter of fact ,he has a serious disease.
They haven’t finished their work. Maybe they have some trouble ______ it. [ ]
Wow, your house is so big!—Yes, it’s three times yours.