At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
#68142
A
confused
B
puzzled
C
disturbed
D
troubled
推荐题目
The police refused to _____ the clues they were working on.
#83732
A
exhibit
B
disclose
C
expose
D
discern
The Browns wrote to Mrs. Anmary to______ her warm reception during the visit to her sanatorium.
#83492
A
acknowledge
B
consult
C
owe
D
evaluate
We are supposed to __________newspapers, magazines and other related books when writing a report.
#69867
A
refer to
B
look up to
C
look forward to
D
see to
Dr. Frank failed many times but he finally _________ to find a successful way to solve the problem.
#67160
A
broke through
B
put up
C
picked out
D
gave away