When he ________ the door，he found his keys were nowhere.

— Did you see the manager in his office? —Yes, he ______ by the journalist from Chongqing Evening.

—-Is it possible for us to meet at ten o’clock tomorrow morning?—-Sorry, it is certainly not. I       an important meeting then.

Mary, stop to have a rest. You _________ the flowers in your garden for nearly two hours.

Professor Smith, along with his assistants, _________on the project day and night to meet the deadline.