In the botanical garden we can find a(n)____of plants that range form tall trees to small flowers.
#4488
A
species
B
group
C
amount
D
variety
推荐题目
In the past ,the miners had to be extremely to bear the uncomfortable conditions at mines.
#4464
A
difficult
B
rough
C
tough
D
brave
Recently, these companies have _____ some workers because of the drop in economy.
#4461
A
hired
B
dismissed
C
refused
D
employed
It was a great _____ for him to be pleasant to people he didn't like.
#4498
A
attempt
B
trouble
C
power
D
effort