___ is really hard ___ them to climb Mount Tai.[ ]

He went to Shanghai ___ September 3, 1991 and came back ___ a cold morning last year. [ ]

I _______ the early bus because I got up late this morning.

I won’t go to Yukio’s birthday this Saturday evening. — If you don’t, ______. [ ]

As we all know, Lost in Thailand is a very successful movie, the cost of ______ is only 30 million yuan.