---Why didn’t you go to yesterday’s meeting?
---I would have but I ______ too busy working on the important experiment.
| A．had been | B．was | C．were | D．am |
Yang Liwei was surrounded by the audience _____ he stepped off the stage.
| A．until | B．through | C．now that | D．instantly |
I don’t know the girl _____ in the storm.
| A．to catch | B．caught | C．catching | D．to be catching |
The pilot asked all the passengers on board to remain _____ as the plane was making a landing.
| A．seat | B．seating | C．seated | D．to be seating |
—I prefer shutting myself in and listening to music all day on Sundays.
—That’s_______ I don’t agree. You should have a more active life.
| A．where | B．how | C．when | D．what |
My sister, an inexperienced
rider, was found sitting on the bicycle _____ to balance it.
| A．having tried | B．trying | C．to try | D．tried |