Dressed untidily and speaking in a strange way, Father must have ______ to the people present to be a silly old man.  
#4885
A
appeared
B
pretended
C
shown
D
thought
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It ______ quite correct that happiness comes from thinking about things in a positive way.
#4973
A
has turned out
B
has been turned out
C
is turning out
D
is turned out
.We will learn how to operate the machine _______.
#4731
A
at a time
B
at one time
C
at the time
D
in time
---What do you think made the woman so upset?--- _____ weight. 
#4811
A
As she put on
B
Put on
C
Putting on
D
Because of putting on
The problems      at the meeting tomorrow are really hard to solve.
#4945
A
discussed
B
to discuss
C
to be discussed
D
discussing