Listen! Helen is singing in the next room. -It ___ be Helen. She has gone to Beijing.

Mary sees the bar as a starting point and______ plans to run her own chain of country inns [ ]

Mike was ________ nervous ________ heforgot to put on his shoes.

have _________ the habit of drinking a cup of water before going to bed. [ ]

We consider ____ we should communicate with others by all means. [ ]