Solar energy is considered as one kind of ______ fuels.

Only after I explained it to him _________the problem.

The word “critical” in paragraph 3 is closest in meaning to _______.

The word “critical” is closest in meaning to__________.

According to the reading passage, how did Joseph Pulitzer appeal to the average reader?

According to a recent survey, most people are________their neighbors.

The phrase “without a hitch” is closet in meaning to __________.

It is implied in paragraph 1 that ______.

Which can be used as a synonym of the word “feelings” ?

Safety experts are trying to establish the _________of yesterday’s train crash.

They froze in ________when they saw the lion.

They always kept on good________with their next-door neighbors for the children’s sake.

I woke up late for my interview because I _________about it all night and didn’t get much sleep.

I can’t find those new socks I bought. I ________them in the store.

It was a _________that the driver survived the crash. His car was completely damaged.

What does the passage mainly discuss?