Not a single book is allowed _______ out of the reading room according to the new rule.
#91923
A
to take
B
taking
C
to be taken
D
being taken
推荐题目
Properly _______ with numbers, the books can be easily found.
#97433
A
marked 
B
mark  
C
to mark  
D
marking
_______ his grades with Arnold’s, George was quite satisfied.
#97075
A
Compared
B
To compare
C
Comparing
D
Compare
I personally think__more listening, speaking, reading and writing is the key to__our English.
#95944
A
Doing; improve
B
To do; improve
C
Do; improving
D
Doing; improving