When the meeting was ______, it was already midnight

It’s burning hot today, isn’t it?—Yes. __________ yesterday.

We cannot figure out ____quite a number of insects, birds, and animals are dying out.

erage rainfall in Ningxia is small, _____ makesthe climate here is drier ______ with othercities in China.

Great changes _____ in China in the past 30 years and many Chinese are living a happy life today