____ volcanoes now for many years, I am still amazed at their beauty as well as their potential to cause great damage.
#91442
A
Studied
B
To study
C
Having studied
D
Studying
推荐题目
He was sent to Australia _______ when he was ten years old.
#95654
A
to be educated
B
to educate
C
educating
D
to be educating
The machine has been made easier for it____.
#94295
A
to operate
B
operated
C
being operated
D
to be operated
In old days, books for blind people used paper ____ against metal wire to form letters.
#95092
A
to press
B
pressing
C
pressed
D
which pressed
It was getting dark; I found a car _____ in a pool by the side of the road.
#98863
A
to be stuck
B
stuck
C
sticking
D
stick
___________ so delicious, the soup is very popular with the kids.
#91579
A
Tasted
B
Tasting
C
To taste
D
Taste