A car engine cannot run smoothly without motor oil.____ our body cannot function efficiently without vitamins.
All visitors to this village __________ with kindness.
What a forgetful person he is! He _________ his key.
A bridge ________ in the distance and its construction ________ in a year.
Mr. Black __________ Shanghai in a few days. Do you know when the earliest plane __________ off on Sunday?
I don't know if she __________, but if she __________, I will let you know.