It is usually not quite cold in this area in March, but sometimes temperature ____be very low.

Do you often use Baidu—-Yes, it’s one of ___________Internet search engines.

It’s nearly eight o’clock. I must hang up and get down to work. My boss________ be here at any moment.

The reason ________he gave is that he missed the early bus.

It’s impossible for us ________there on foot in two hours.