He kept smiling secretly and we were all wondering      that made him so happy.
#93986
A
how it did
B
what he did
C
how it was
D
what it was
推荐题目
_________a stone tower near the old pine tree.
#92773
A
It used to be
B
There used to be
C
There used to have
D
It is used to be
This dictionary, few pages ___are missing, is of great importance. 
#93704
A
among which
B
of which
C
in which
D
to which
I ________ it myself ________ your homework.
#93569
A
prefer do; rather than copy
B
prefer doing; than copy
C
would do; rather than copy
D
would rather do; than copy