The element radium, ______ in the chemistry lab, gave off a blue light.
#95374
A
discovering
B
to be discovered
C
to discover
D
discovered
推荐题目
When I came in, the children pretended ________ and no one even raised their eyes.
#92843
A
to read
B
have read
C
to be reading
D
to have been reading
_______ in the computer game, Peter didn’t notice his father approaching.
#88699
A
Being lost
B
Lost
C
Losing
D
To lose
Many rules in English are ______, and large numbers of students feel ______ them.
#96132
A
puzzled; puzzled with
B
puzzling; puzzled about
C
puzzled; puzzling with
D
puzzling; puzzling about