The park has been home to many ____ species.
A.in danger
B.danger
C.extinct
D.endangered

I don’t like the song because its rhythm is too ____ to me.
A.big
B.large
C.strong
D.healthy

Many parts of the old palace were destroyed in the fire but most of its valuables remained ____.
A.ruined
B.similar
C.untouched
D.same

In spite of many unexpected changes, Betty is always ____ her working.
A.devoted to
B.loyal to
C.informed of
D.meaning to

Drinking too much coffee can get you staying ____ the whole night.
A.long
B.awake
C.sleepy
D.waking

The sale assistants are so ____; they spend more time chatting to each other than serving customers.
A.helpless
B.unhelpful
C.helping
D.helped

Most of the theories on the issue are ____.
A.opposing
B.opponent
C.confronting
D.conflicting

Tomorrow we can expect to see an end to the ____ rain in the region, but it will remain cloudy.
A.hard
B.heavy
C.strong
D.rough

A scientific hypothesis is tested in a series of ____ experiments.
A.controlled
B.limited
C.theoretical
D.supervised

After ____ attempts, Michael finally passed his graduation examination.
A.repetition
B.repeated
C.repeatable
D.repeating