The pilot asked all the passengers on board to remain________ as the plane was making a landing. 
#94393
A
seat
B
seating
C
seated
D
to be seating
推荐题目
_______ a chance, we are bound to visit the 2010 Shanghai EXPO. 
#97138
A
To be given
B
Given
C
Giving
D
Having given
When one makes new friends, don’t forget ______ old ones.
#95739
A
to come up with
B
losing sight of
C
to keep track of
D
keeping in touch with
 ____ to cholera, the people became _______.
#90474
A
Exposed; terrified
B
Exposing; terrified
C
To expose, terrifying
D
Exposed; terrifying