_______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes.
#96728
A
Being invented
B
Inventing
C
Invented
D
Having invented
推荐题目
.Xinyu, a city dubbed as “a pearl in western Jiangxi province”, was struck by a heavy rain last week, ________ serious traffic problems.
#95538
A
to face
B
faced
C
facing
D
having faced
Mary hasn't decided whether to take up tennis, basketball, or ___.
#97774
A
beginning to play football
B
begin to play football
C
beginning playing football
D
to beginning playing football
With a lot of difficult problems_____, the newly-elected president is having a hard time.
#95662
A
settled
B
settling
C
to settle
D
being settling
Recently a survey ____ prices of the same goods in two different supermarkets has caused a heated discussion among citizens.
#92248
A
comparing
B
compared
C
compares
D
being compared
She prepared a great meal to ______ the help of her neighbors in finding her lost little daughter.
#96988
A
express
B
admit
C
explain
D
acknowledge