I’m Bob. What’s your name?—Mary. How are you?

He land the spacecraft _______ the moon together _______ Aldrin. [ ]

The young boy is good _____ me. He is good _____ playing basketball. He often tells me that it is good _____ my health to do more exercise. [ ]

My computer began to return to the ______ running state after I killed the virus by newly-updated Kaspersky.

There will be a talk ____ American history this afternoon.[ ]