With a lot of difficult problems________, the manager felt worried all the time.[ ]

Have you heard ____ news The price of ____ petrol isgoing up again.

Inc, __________ the way we communicate with its smartphones, released the Apple Watch on March 9, 2015 in San Francisco, US.

The examination will begin at 10:30. Those who come late ____ to the examination room. [ ]

The Sina Microblog provides a good ________for those who want to express their opinions and exchange their ideas withothers