The smoggy weather has made us realize ________ terrible problems we are faced with.
#65905
A
how
B
what
C
that
D
which
推荐题目
＿＿＿! You should take this chance to attend it.
#66289
A
How important conference is it
B
How an important conference it is
C
What an important conference is it
D
What an important conference it is
__________at the door before you enter the office，or you’ll be considered impolite
#65893
A
Knocking
B
Knocked
C
Knock
D
To knock