—Jim managed to get into his house without the key._______?—I don't know. He might have asked someone for help.
. —When will you be back, Peter? —___________ a couple of days.
. . All books ___________ to the library more than three days late will be subject to a fine.
. When he was only thirty years old, he had already experienced ___________ most people only experience when they are much older.
. ___________ in the sports world, a sportsman needs to train constantly to keep himself in best condition.
. Listen, Mike. She ________________ have done it. She's been with me at the shop all day.