— He hardly spent any time on his subjects, _________?—_________, so he did badly in his lessons.

__ is really hard __ them to climb Mount Tai. 

--- Will they come to the party?--- _______. They’ll have an English test.

There will be a new park in the center of the city, ______?

—Oh, you have a headache and a cough. __________ have you been like this?— Two days.