________about her son’s future, the mother has been sleeping very badly these months.
#90619
A
Concerning
B
Concerned
C
To concern
D
Having concerned
推荐题目
 We did not expect our offer _____ so quickly. 
#97501
A
rejected
B
to reject .
C
to be rejected
D
rejecting
English teachers are supposed ________ their students a test in class, even after class, ________ better teaching results.
#89323
A
to give; ensuring
B
giving; to ensure
C
to give; to ensure
D
giving; ensuring
The newly-discovered evidence led to the criminal ____ to five years in prison.
#90088
A
to be sentenced
B
being sentenced
C
sentenced
D
be sentenced
The excellent student, _______ abroad for many years, is on the way back to her own country.
#95652
A
to study
B
studying
C
to have studied
D
having studied