（ ） relatively costly, the engine is highly efficient and needs servicing infrequently.

It’s too late to go out. _____， it’s going to rain.

The engineer （ ） my father works is about 50 years old.

Without his wartime experience, Hemingway _____ his famous novel A Farewell to Arms.

（ ） is known to all, the earth moves around the sun once a year.

He （ ） yesterday morning, and would stay for three days.

Each car sold in this specialized shop comes with a one-year （ ）.

This is the very house （ ） my grandpa lived before his death in 1980.

It is reported that a plane has ______ in the mountainous area near the borderline of that country.

You _____ all those calculations! We have a computer to do this sort of things.

There is a lot of evidence（ ）too much stress is partly responsible for the disease．

The young man had decided to give up the chance of studying abroad, ______ surprised his parents a lot.