27．—Mary, you didn’t show up at the meeting last week? —No, I________, but my son had a sudden fever and I had to stay at home to take care of him

When you go to a new country, you must _____ yourselfto new manners and customs.

Our teacher always tells us that lessons can be learned to face the future, ____ history can’t be changed.

I often go out for a walk along the street _____ to the river bank. [ ]

“_____ when does the pub stay open？” “About midnight.”