—Why didn’t Tom go to the concert last night ?— I have no idea,but I think he _____ in his study.
____ the news, so far, has been good, there may be bad days ahead.
Not until the train pulled into the next station ____ her suitcase gone.
Since 1994, the glacier in Antarctica has lowered by as much as 90cm, ____sea level to rise.
—Flight MU257 ____ . I must be off now.—Have a nice trip.
When ____ comes to saving energy, big changes start with small steps, like turning off the lights.