__________at the door before you enter the office，or you’ll be considered impolite
#65893
A
Knocking
B
Knocked
C
Knock
D
To knock
推荐题目
For more information on how to apply for scholarship, ______ our Web site at www.edu/scholarship.
#66009
A
visiting
B
to visit
C
visit
D
visits
______ for the boy to talk with his mouth full!
#65998
A
What bad manners they are
B
How bad manners they are
C
What bad manners it is
D
How bad manners it is
You can’t imagine ______ when they received these nice Christmas presents.
#65973
A
how they were excited
B
how excited they were
C
how excited were they
D
they were how excited