As a result of our trip to Hanoi, we were able to forge a partnership with one of our ____ competitors.
A.precedent
B.former
C.last
D.sooner

“This file is very important. You should include it in our document.” – “I know. It is ____.”
A.indispensable
B.indistinct
C.significant
D.optional

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