This kind of bamboo is suitable _____ pandas _____ eat.[ ]

What’s this?—It’s a machine which was invented in __________century in China.

We waited for him at the school gate , but he didn’t appear until nine.

.______ pressure the U.S. government put on the Chinese government, China would stick to its own policy of exchange rate.

How often do you go to a concert?－______ever. I’m not interested in concerts at all.