There was a _______look on his face when he met with the______problem. 
#94501
A
confusing;confusing
B
confused;confused
C
confusing;confused
D
confused;confusing
推荐题目
The element radium, ______ in the chemistry lab, gave off a blue light.
#95374
A
discovering
B
to be discovered
C
to discover
D
discovered
More and more carbon dioxide is being released into the air,________the more severe global warming effects.
#89528
A
contributed to
B
to contribute to
C
contributing to
D
to be contributed to
The children went back home from the grammar school, their lessons ________ for the day.
#91666
A
finishing
B
had been finished
C
finished
D
had finished