Department restructuring will be discussed at the ..... monthly meeting

Directions: A word or phrase is missing in each of the sentences below. Four answer choices are given below each sentence. Select the best answer to complete the sentence.
1.Department restructuring will be discussed at the ..... monthly meeting.(1 Điểm)
next
always
soon
like
2.To keep ..... park beautiful, please place your nonrecyclables in the available trash cans.(1 Điểm)
our
we
us
ours
3.The chief engineer noted that constructing another bridge would be more ..... than repairing the existing structure.
(1 Điểm)
economy
economics
economically
economical