Have you seen Maragaret? The boss is looking for her everywhere.—She________the train, otherwise she would have arrived here by now.

The doctor thought _____ would be good for you to have a holiday.[ ]

Let’s hold a party toyour birthday and at the same time you on your passing the driving test.[ ]

It remains doubtful whether the project_____________ next month will bring profits to the company

p healthy, most retired old people_____ jogging as a regular form of exercise．