Many students thought about the third question for quite a while and had great difficulty answering it. Obviously， it was _____ all.

I recognized John （ ） he entered the room.

It （ ） that the jewels had been stolen by a traveler.

I cannot tell the_____difference between the twins.

Mass production has made （ ） the goods and services we want at a lower price.

The price of fish is （ ） during the Spring Festival.

The kidney transplant operation was _____ complicated， so the operating team had to take special care to ensure its success.

He made another wonderful discovery, （ ） of great importance to science.

Patients’bills of rights require that they （ ） informed about their condition and about alternatives for treatment.

The restaurant is busy on Sundays, so I’ll make a phone call today to _____ a table.

Do you feel like_____today?

The doctor said that mental （ ） is the major cause of his sleeping problem.