.Mary quickly closed the door of her room _______ her father could reach it to keep him out.
#24669
A
before
B
when
C
as
D
while
推荐题目
 _________, the subject belongs to biology.
#24146
A
Strictly spoken
B
Spoken strictly
C
Strictly speaking
D
Speaking strictly
.Is there ______ rain in your area in spring? 
#24331
A
plenty of
B
a great many
C
a large number of
D
much