____ abroad for two years, the two astronauts went back home last year.

.The vocabulary and grammatical differences between British and American English are so few and unimportant as hardly______.

She was the only one __________ the wreck.

The direct flight has proved successful，________ Taiwan another tourist destination for people on the mainland.

When you long for life without difficulties, _____ yourselves that trees grow strong in contrary winds and diamonds are made under pressure.