I think I had at least a billion tests, including _____ in which they cut out a piece of muscle from my leg and looked at it under a microscope.
| A．that | B．the one |
| C．it | D．one |
Much _____ to be settled.
| A．remains | B．remembers | C．forgets | D．leaves |
It would be _____ a risk to let the child go to school by himself.
| A．running | B．following | C．passing | D．carrying |
He _____ the cooking yesterday.
| A．did | B．made | C．took | D．had |
I _____ to him for what I said.
| A．excused | B．apologized | C．pardoned | D．explained |
_____ at the door before you come into the room.
| A．Hit | B．Knock | C．Touch | D．Strike |