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

My university lies in the north of the city, around （ ） high mountains.

The defense computers calculate way to （ ） the enemy missiles.

It is very expensive to （ ） the fashion.

My children are looking forward to （ ） a trip to Paris.

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

He studies so hard to avoid （ ） at the bottom of the class.

_____, the professor is still trying to learn a new language.

（ ） the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.

It is （ ） impossible to work with this noise around.

_____ more time，he’ll make a first-class tennis player sooner or later.

The defense computers calculate way to （ ） the enemy missiles.